Presented as Thesis (Ph. D.)--University of Wisconsin--Madison, 1925. / Reprinted from Journal of the American Society of Agronomy: Part 1: Vol. 21, no. 2 (Feb. 1929) -- Part 2: Vol. 21, no. 4 (Apr. 1929). Includes bibliographical references.
Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/608733526 |
Date | January 1900 |
Creators | Janssen, George. |
Publisher | [Geneva, N.Y., |
Source Sets | OCLC |
Language | English |
Detected Language | English |
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