Billington, D. P. (1996). The innovators: The engineering pioneers who made America modern. New York: Wiley.
Παραπομπή Chicago StyleBillington, David P. The Innovators: The Engineering Pioneers Who Made America Modern. New York: Wiley, 1996.
Παραπομπή MLABillington, David P. The Innovators: The Engineering Pioneers Who Made America Modern. New York: Wiley, 1996.
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