Soils of the eastern United States and their use-- XXXIII. The Carrington clay loam Bonsteel, Jay A. (Jay Allan), 1873- creator text book Washington Govt. print. off 1912 1912
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ENG Soils United States United States. Dept. of Agriculture. Bureau of Soils. Circular, no. 58 https://www.biodiversitylibrary.org/bibliography/18734 29759445 10.5962/bhl.title.18734 Library, U.S. Dept. of Agriculture