Soils of the eastern United States and their use-- XXXVIII. Muck and peat Bonsteel, Jay A. (Jay Allan), 1873- creator text book Washington Govt. print. off 1912 1912
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ENG Humus Peat Soils United States United States. Dept. of Agriculture. Bureau of Soils. Circular, no. 65 https://www.biodiversitylibrary.org/bibliography/19228 29762858 10.5962/bhl.title.19228 Library, U.S. Dept. of Agriculture