Vitamine - Gesund ernähren, Aktiv leben Alles, was Sie über Vitamine, Mineralstoffe und eine gesunde Ernährung wissen müssen

Leicester, Silverdale Books 2002, cm.23,5x31,5, pp.174, ill. col. harcover, dustjacket. After the first tractors appeared on the scene in the late 1890s, it took another two decades and plenty of modifications for farmers to embrace this once-crude technology in favor of the steam engine, further advancing the power-farming revolution. Written by an international expert in agricultural machinery, Farm Tractors takes readers back to the nineteenth century to look at the precursors to modern tractors and travels through the years to follow the machine's evolution as tractors became indispensable equipment on farms across America. Inside:-How steam-powered machinery gave way to tractors, and how tractors changed the way that farmers worked.