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By "Weir, Wilbert Wilter, (Born - 1882)"
Productive soils; the fundamentals of successful soil management and profitable crop production, by Wilbert Walter Weir ... 235 illustrations in the text.
By: Weir, Wilbert Wilter,
Publication info: London,J.B. Lippincott company[c1920]
Contributed by: University of California Libraries (archive.org)