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- catalog contributor b7068439.
- catalog contributor b7068440.
- catalog created "1950.".
- catalog date "1950".
- catalog date "1950.".
- catalog dateCopyrighted "1950.".
- catalog extent "vii, 87 p.".
- catalog issued "1950".
- catalog issued "1950.".
- catalog language "eng".
- catalog publisher "Washington,".
- catalog subject "631.3".
- catalog subject "Farm mechanization.".
- catalog subject "S675 .P58".
- catalog title "Progress and economic problems in farm mechanization, prepared by A. M. Acock, production economist, Economics, Marketing, and Statistics Division.".
- catalog type "text".