Tvengsberg, P. M. 1995. «Rye and swidden cultivation», Tools and Tillage 7:131–146.

Tyne Built Ships. 2015. «Gtockauf», http://www.tynebuiltships.co.uk/G-Ships/gluckaufl886.html.

UNDP (United Nations Development Programme). 2015. «Human Development Report 2015», New York: UNDP.

UNESCO. 2015a. «Head-Smashed-In Buffalo Jump», http://whc.unesco.org/en/list/158.

UNESCO. 2015b. «Mount Qingcheng and Dujianyang Irrigation System», http://whc.unesco.org/en/ list/1001.

Unger, R. 1984. «Energy sources for the Dutch Golden Age», Research in Economic History 9:221–253.

United Nations Organization. 1956. «World energy requirements in 1975 and 2000», In «Proceedings of the

International Conference on the Peaceful Uses of Atomic Energy», vol. 1, 3-33. New York: UNO.

Upham, C. W., ed. 1851. «The life of General Washington: First President of the United States», vol. 2. London:

National Illustrated Library.

Urbanski, T. 1967. «Chemistry and Technology of Explosives», New York: Pergamon Press.

U.S. Strategic Bombing Survey. 1947. «Effects of Air Attack on Urban Complex Tokyo-Kawasaki-Yokoha-ma»,

Washington, DC: U.S. Strategic Bombing Survey.

USBC (U.S. Bureau of the Census). 1954. «U.S. Census of Manufacturers: 195», Washington, DC: U.S. GPO. USBC. 1975. «Historical Statistics of the United States: Colonial Times to 1970», Washington, DC: USBC. U.S. Centennial of Flight Commission. 2003. «History of Flight». Washington, DC. U.S. Centennial of Flight Commission, http://www.centennialofflight.gov/hof/index.htm.

USDA (U.S. Department of Agriculture). 1959. «Changes in Farm Production and Efficiency», Washington, DC: USDA.

USDA. 2011. «National Nutrient Database for Standard Reference», http://ndb.nal.usda.gov. USDA. 2014. «Multi-Cropping Practices: Recent Trends in Double Cropping», Washington, DC: USDA. USDOE (U.S. Department of Energy). 2011. «Biodiesel Basics», http://www.afdc.energy.gov/pdfs/47504.pdf. USDOE. 2013. «Energy efficiency of LEDs», http://appsl.eere.energy.gov/buildings/publications/pdfs/ssl/led_ energy_efficiency. pdf.

USDOL (U.S. Department of Labor). 2015. «Employment by major industry sector», http://www.bls.gov/ emp/ep_table_201.htm.

USEIA (U.S. Energy Information Agency). 2014. «Consumer energy expenditures are roughly 5 % of disposable

income, below long-term average», http://www.eia.gov/todayinenergy/detail.cfm?id=84530.

USEIA. 2015a. «Annual Coal Report», http://www.eia.gov/coal/annual.

USEIA. 2015b. «China», http://www.eia.gov/beta/international/analysis.cfm?iso=CHN.

USEIA. 2015c. «Direct Federal Financial Interventions and Subsidies in Energy in Fiscal Year 2013», Washington, DC: USEIA. http://www.eia.gov/analysis/requests/subsidy.

USEIA. 2015d. «Energy intensity», http://www.eia.gov/cfapps/ipdbproject/iedindex3. cfm?tid=84530&pid=84530&aid=84530. USEIA. 2016a. «Coal», http://www.eia.gov/coal.

USEIA. 2016b. «U.S. imports from Iraq of crude oil and petroleum products», https://www.eia.gov/dnav/ pet/hist/ LeafHandler.ashx?n=pet&s=mttimizl&f=a.

USEPA (U.S. Environmental Protection Agency). 2004. «Photochemical smog» http://www.epa.sa.gov.au/ files/8238_ info_photosmog.pd.

USEPA. 2015. «Light-Duty Automotive Technology, Carbon Dioxide Emissions, and Fuel Economy Trends: 1975 Through 2015», https://www3.epa.gov/fueleconomy/fetrends/1975-2015/420rl5016.pdf.

USGS (U.S. Geological Survey). 2015. «Commodity statistics and information», http://minerals.usgs.gov/ minerals/ pubs/commodity.

Usher, A. P. 1954. «А History of Mechanical Inventions», Cambridge, MA: Harvard University Press.

Utley, F. 1925. «Trade Guilds of the Later Roman Empire», London: London School of Economics.

Van Beek, G. W. 1987. «Arches and vaults in the ancient Near East», Scientific American 257 (2): 96-103.

van Duijn, J. J. 1983. «The Long Wave in Economic Life», London: George Allen & Unwin.

Van Noten, F., and J. Raymaekers. 1988. «Early iron smelting in Central Africa», Scientific American 258:104–111.

Varvoglis, H. 2014. «History and Evolution of Concepts in Physics», Berlin: Springer.

Vasko, T., R. Ayres, and L. Fontvieille, eds. 1990. «Life Cycles and Long Waves. Berlin: Springer-Verlag.

Veraverbeke, W. S., and J. A. Delcour. 2002. «Wheat protein composition and properties of wheat glutenin in relation

to breadmaking functionality», Critical Reviews in Food Science and Nutrition 42:179–208.

Versatile. 2015. «Versatile», http://www.versatile-ag.ca.

Vikingeskibs Museet. 2016. «Wool sailcloth», http://www.vikingeskibsmuseet.dk/en/professions/boat-yard /

experimental-archaeological-research/maritime-crafts/maritime-technology/woollen-sailcloth.

Ville, S. P. 1990. «Transport and the Development of European Economy, 1750–1918», London: Macmillan.

Villiers, G. 1976. «The British Heavy Horse», London: Barrie and Jenkins.

Vogel, H. U. 1993. «The Great Wall of China», Scientific American 268 (6): 116–121.

Volkswagen, A. G. 2013. «Ivan Hirst», http://www.volkswagenag.com/content/vwcorp/info_cen-ter/en/ publications/2013/1 l/ivan_hirst.bin.html/binarystorageitem/file/VWAG_HN_4_Ivan-Hirst-

eng_2013_10_18.pdf. von Braun, W., and F. I. Ordway. 1975. «History of Rocketry and Space Travel». New York: Thomas Y. Crowell, von Hippel, Frank, et al. 1988. «Civilian casualties from counterforce attacks», Scientific American 259 (3): 36–42. von Tunzelmann, G. N. 1978. «Steam Power and British Industrialization to 1860», Oxford: Clarendon Press. Wailes, R. 1975. «Windmills in England: A Study of Their Origin, Development and Future», London: Architectural Press.

Waldron, A. 1990. «The Great Wall of China», Cambridge: Cambridge University Press. Walther, R. 2007. «Pechelbronn: A la source du petrole, 1735–1970», Strasbourg: Hirle.

Walton, S. A., ed. 2006. «Wind and Water in the Middle Ages: Fluid Technologies from Antiquity to the Renaissance», Tempe: Arizona Center for Medieval and Renaissance Studies.

Walz, W., and H. Niemann. 1997. «Daimler-Benz: Wo das Auto Anfing.»,Konstanz: Verlag Stadler. Wang, Z. 1991. «А History of Chinese Firearms», Beijing: Military Science Press.

War Chronicle. 2015. «Estimated war dead World War II», http://warchronicle.com/numbers/WWII/ deaths.htm.

Warburton, M. 2001. «Barefoot running», Sportscience 5 (3): 1–4.

Warde, P. 2007. «Energy Consumption in England and Wales, 1560–2004», Naples: Consiglio Nazionale della Ricerche.