How to know the grasshopper, cockroaches and their allies : pictured-keys for identifying many of the grasshoppers, crickets, katydids, earwigs, termites, cockroaches, praying mantids, rock-crawlers, and walkingsticks occuring in North America, north of Mexico / by Jacques R. Helfer.
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TextSeries: Pictured-key nature seriesPublication details: Iowa (USA) : WM.C. Brown, 1953.Description: vi, 354 p. : il. ; 22 cmSubject(s):
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