20th and 21st Century Technological Inventions
Martes, Hunyo 16, 2015
10. The combine harvester, 1930s
Mechanized the farm, freeing people to do new types of work.
http://www.theatlantic.com/magazine/archive/2013/11/innovations-list/309536/#sthash.OPO28ePN.dpuf
Rivera, Therenz
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