Description
Item Description:Reprint of the 1947 edition of Progress of farm mechanization, by M. R. Cooper, G. T. Barton, and A. P. Brodell, published by U.S. Govt. Print. Off., Washington, as Miscellaneous publication number 630 of the U.S. Dept. of Agriculture; and of the 1949 edition of Changes in American farming, by S. E. Johnson, published by U.S. Govt. Print. Off., Washington, as Miscellaneous publication number 707 of the U.S. Dept. of Agriculture.
Physical Description:101, 75 pages : illustrations ; 24 cm.
ISBN:0405077734