Farm work simplification
Vanghan, Lawrence M.
Farm work simplification Lawrence M. Vanghan and Lowell S. Hardin - New York John Wiley 1949 - xii, 145 p.; 2cm.
631 V10F
Farm work simplification Lawrence M. Vanghan and Lowell S. Hardin - New York John Wiley 1949 - xii, 145 p.; 2cm.
631 V10F