Dragonflies and Damselflies: References

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Registered uses of reference:
Williamson, E.B (1899) Calopteryx angustipennis Selys in western Pennsylvania Ent. News 1899:199-200
Genus authorship : 0

Species-level taxonomy : 0

Subspecies taxonomy : 0

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Distribution : 0

Conservation : 0

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Biology : 0