The pear leaf-worm
By: by R.L. Nougaret, W.M. Davidson and E.J. Newcomer
Contributors: Davidson, W. M. (William Mark), 1887-; Newcomer, E. J. (Erval Jackson), 1890-
Series: Bulletin / United States Department of Agriculture -- no. 438; Bulletin of the U.S. Department of Agriculture -- no. 438.
Publisher: U.S. Dept. of Agriculture
Published: 1916
Place of publication: Washington, D.C
Language: eng
Number of pages: 24
Subjects: Pear; Diseases and pests; Pear leaf-worm
Other titles: Pear leaf worm.
Notes: Caption title.

"December 11, 1916."

"Professional paper."

Bibliography: p. 23.