1. Farm inventions in the making of America
Author: Johnson, Paul Cornelius
Library: Library and Documentation Center of Iranian Research Organization for Science and Technology (Tehran)
Subject: $AAgricultural machinery - United States - History,$AInventions - United States - History
Classification :
S
751
.
J63
2. Farm power in the making of America
Author: Johnson, Paul Cornelius
Library: Library and Documentation Center of Iranian Research Organization for Science and Technology (Tehran)
Subject: $ASteam - engines - U.S,$AWindmills - U.S,$ATractors - U.S,$AAutomobiles - U.S,$AFarm mechanization - U.S. History
Classification :
TJ
712
.
J63
