On the dying oak and hickory trees on Long Island, New York
Subtitle: Objects and results of investigations
By: A. D. Hopkins
Contributors: United States. Bureau of Entomology; United States. Bureau of Entomology and Plant Quarantine
Series: Forest entomology brief -- D; Forest entomology brief -- D.
Publisher: U.S. Dept. of Agriculture, Bureau of Entomology
Published: 1916
Place of publication: Washington, D.C
Language: eng
Subjects: Hickories; Diseases and pests; Oak; Research
Notes: "E-70."

"June 20, 1916."