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Weather and profitable machinery size
(North Dakota State University, 1969)
Crop costs and returns : hard red spring wheat
(North Dakota State University, 1971)
Machinery costs for crop production : (including small grains, hay, row crops)
(North Dakota State University, 1968)
Crop costs and returns : durum wheat
(North Dakota State University, 1971)
Crop costs and returns : flaxseed
(North Dakota State University, 1971)
Crop costs and returns : oats
(North Dakota State University, 1971)
Crop costs and returns : soybeans, pinto beans, corn and sunflowers
(North Dakota State University, 1971)
Crop costs and returns : barley
(North Dakota State University, 1971)