generic classification of California aphids by means of first instar nymphs
By: by Wilson Sampson.
Series: University of California publications in entomology -- v. 7, no. 12.
Publisher: University of California press
Published: 1946
Place of publication: Berkeley; Los Angeles
Language: eng
Number of pages: 402
Subjects: Aphididae.; Hemiptera -- California.
Notes: Based on thesis (Ph. D.)--University of California, 1940.

Without thesis note.

"Literature cited": p. 402.