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Report of the Chief of the Bureau of Chemistry and Soils

United States. Bureau of Chemistry and Soils

出版	U.S. Department of Agriculture, Bureau of Chemistry and Soils, 1929
URL	http://books.google.com.hk/books?id=LAzxlyOGixwC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

The Bureau of Chemistry and Soils was created July 1, 1927 for the purpose of correlating all the research work formerly carried on by the Bureau of Chemistry, Bureau of Soils, Fixed Nitrogen Research Laboratory, and the Division of Soil Fertility and Soil Bacteriology of the Bureau of Plan Industry.