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The first principles of agriculture
Special report on prices of tractors and combines ...
Brandon area study : elevator receipts and analysis ...
Agriculture in an unstable economy
Modern nature study : a first book for ...
The agricultural commodity programs : two decades of ...
Plant diseases : the yearbook of agriculture, 1953
Elementary agriculture with practical arithmetic
A history of agricultural education in the United ...
Agriculture: Keystone Agricultural Producers
The New era in world agricultural trade : ...
Proceedings of the Thirteenth International Conference of Agricultural ...
Research- Pesticides, Fertilizers etc. Agriculture
Nediger study
Cost study
Economic impact of rail branch-line abandonment : research ...
The first fifty years : a history of ...
Collective bargaining in agriculture
The Agriculturist's calculator : a series of tables ...