Detection of pear psylla
By: [by Everett C. Burts and Arthur H. Retan].
Series: Insect answers; Extension mimeo -- 3069.; Extension mimeo (Washington State University. Cooperative Extension) -- 3069.
Publisher: Cooperative Extension Service, College of Agriculture, Washington State University
Published: 1969
Place of publication: Pullman
Language: eng
Notes: Caption title.

"February 1969."

"E.M. 3069."