How to identify Dutch elm disease
By: J. R. Allison.
Contributors: United States. State and Private Forestry. Northeastern Area.
Publisher: Dept. of Agriculture, Forest Service, Northeastern Area, State and Private Forestry
Published: 1978
Place of publication: [Upper Darby, Pa.]
Language: eng
Subjects: Dutch elm disease -- United States.
Notes: Issued July 1978.