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robert a behrstock
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Birdlife of Houston, Galveston, and the Upper Texas coast
Ted Eubanks, Robert A. Behrstock, Ron J. Weeks · Texas A&M University Press
328 sayfa · 2006
Birdwatching Guides / Animals / NATURE / SCIENCE / Ornithology
Dragonflies & damselflies of the Southwest
Robert A. Behrstock · Rio Nuevo Publishers
80 sayfa · 2008
Classification / Damselflies / Dragonflies / Identification