... Directions for collecting and preserving specimens of dragonflies for museum purposes
By: by E. B. Williamson.
Series: University of Michigan.  Museum of zoology.  Miscellaneous publications,; no. 1
Publisher: The University
Published: 1916
Place of publication: Ann Arbor, Mich
Language: eng
Number of pages: 15
Subjects: Insects -- Collection and preservation.; Dragonflies.