How to know the grasshoppers, cockroaches [sic] and their allies
Subtitle: 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: all illus. drawn by Jacques R. Helfer.
Series: Pictured-key nature series
Place of publication: Dubuque, Iowa
Number of pages: 353
Subjects: Orthoptera -- North America.
Other titles: How to know the grasshoppers, cockroaches and their allies.
Notes: 6