Proceedings of the twentieth annual convention of the Association of Official Agricultural Chemists held at Washington, D.C., November 19, 20 and 21, 1903 / edited by Harvey W. Wiley.

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Association of Official Agricultural Chemists (U.S.). Convention 1903 : Washington, D.C.)

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Proceedings of the twentieth annual convention of the Association of Official Agricultural Chemists held at Washington, D.C., November 19, 20 and 21, 1903 / edited by Harvey W. Wiley.