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A contribution to the biology of North American Vespine wasps
By Carl D Duncan
Stanford Universuty Press, 1939
Cite: 859619 with citation markup [cite:859619]
This is the first major work on the morphology and taxonomy of North American Vespine wasps. This book extensively studies the internal and external morphology of the western yellowjacket Vespula pensylvanica as well as provides a chapter on Vespine systematics and also provides subsequent chapters which extensivly review the biology and behavior of the Vespinae species from the Western United States. This book is an excellent read and threrefore highly reccomended.

Here is a link to a readable/downloadable copy of this work: