... Notes on American species of Triacanthagyna and Gynacantha
By: by E. B. Williamson.
Series: University of Michigan.  Museum of zoology.  Miscellaneous publications,; no. 9
Publisher: The University
Published: 1923
Place of publication: Ann Arbor, Mich
Language: eng
Number of pages: 80
Subjects: Dragonflies.
Notes: Bibliography:  p. 50-53.