Legumes and grasses in dryland cropping systems in the northern and central Great Plains : a review of the literature Brown, P. L. (Paul L.) creator text book Washington, D.C Agricultural Research Service, U.S. Dept. of Agriculture 1964 1964
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ENG Crop rotation Grasses High Plains (U.S.) Legumes Miscellaneous publication / United States Department of Agriculture, no. 952 https://www.biodiversitylibrary.org/bibliography/65685 10120120890225 agr64000238 10.5962/bhl.title.65685 DLC