Knowles Augustus Ryerson collection, 1918-1919.
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Ryerson, Knowles Augustus, 1892-1990
http://n2t.net/ark:/99166/w6n87wrr (person)
M.S., Horticulture, University of California, Berkeley (1923) ; Agriculture Extension Agent specializing in subtropical horticulture, at University of California, Berkeley and Davis ; researcher, USDA and Bureau of Plant Industry ; Dean, College of Agriculture, University of California, Davis (1937-1952). From the description of Papers, 1914-1979. (University of California, Davis). WorldCat record id: 56969391 ...