Technikatörténeti szemle 15. (1985)

TANULMÁNYOK - Amram, M. Fred: Women’s contributions to the history of technology

A. TREXLEE. COMBINED PLOW AND HARROW. No. 389,675. Patented Sept. 18, 1888. WITNESSES: INVENTOR: BY AUvw ATTORNEYS. Anna Trexler's „Compiled Plow and Harrow" reflects knowledge of prior technology