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Last edited anonymously
August 18, 2008 | History

Jacques R. Helfer

We need a photo of Jacques R. Helfer

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  • Cover of: How to know the grasshoppers, cockcroaches [sic] 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.

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  • Cover of: How to know the rocks and minerals

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We need a photo of Jacques R. Helfer

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August 18, 2008 Edited by an anonymous user fix author name
April 1, 2008 Created by an anonymous user initial import