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Weather and profitable machinery size
(North Dakota State University, 1969)
Over-the-tree-row Cultivators
(North Dakota State University, 1960)
Machinery costs for crop production : (including small grains, hay, row crops)
(North Dakota State University, 1968)
Remove Metal from Livestock Feeds...to prevent "hardware disease"
(North Dakota State University, 1962)
Pocket Gopher Control with Mechanical Burrow Builder Machine
(North Dakota State University, 1960)