Quantitative relationships of carbon, phosphorus, and nitrogen in soils Stewart, Robert, 1877- creator text book Urbana 1910 1910
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ENG Cover-title. "Published by the University of Illinois Agricultural Experiment Station Bulletin no. 145." Thesis (PH. D.)--Univ. of Illinois. Analysis Soils https://www.biodiversitylibrary.org/bibliography/25295 29717394 a10002411 10.5962/bhl.title.25295 Illinois Univ.