Não informado. (1915). Journal of the Association of Official Agricultural Chemists. Association of Official Analytical Chemists.
Chicago-referens (17:e uppl.)Não informado. Journal of the Association of Official Agricultural Chemists. Baltimore, Md: Association of Official Analytical Chemists, 1915.
MLA-referens (8:e uppl.)Não informado. Journal of the Association of Official Agricultural Chemists. Association of Official Analytical Chemists, 1915.
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