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By "Blasingame, Ralph Upshaw. "
Soils and soil cultivation, a non-technical manual on the management of soil for the production and maintenance of fertility, by Frank D. Gardner ... assisted by R.U. Blasingame ...
By: Gardner, Frank Duane, - Blasingame, Ralph Upshaw.
Publication info: Chicago,The John C. Winston Company[c1918]
Contributed by: University of California Libraries (archive.org)