Title
The differentials of three North American species of Libellula
By
Calvert, Philip Powell, 1871-1961
Original Publication
Entomological news, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia
Published by
Philadelphia, [Entomological Rooms of the Academy of Natural Sciences],
Identifiers
BioStor:
https://biostor.org/reference/70560