PHYSIOLOGICAL GROUP DIFFERENTIATION IN LYMNAEA COLUMELLA.

Johns Hopkins University Press, Baltimore. 1939.

8vo, 133pp, 2 b/w plates, tables (2 folding) , graphs. A near fine hardback copy no dust jacket.

The American Journal of Hygiene Monographic Series no. 14, April, 1939.

Item #112492

Price: $20.00

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