Published by The American Naturalist Vol. LXXXV March-April, 1951 No. 821, 1951
Pamphlet. Condition: Good. Prompt Shipment, shipped in Boxes, Tracking PROVIDEDOffprint. Staple binding, slight brown residue around staples, The American Naturalist Vol. LXXXV March-April, 1951 No. 821.