How to identify Dutch elm disease /

Bibliographic Details
Main Author:	Allison, James R.
Corporate Author:	United States. State and Private Forestry. Northeastern Area
Format:	Government Document Book
Language:	English
Published:	[Upper Darby, Pa.] : Dept. of Agriculture, Forest Service, Northeastern Area, State and Private Forestry, 1978.
Subjects:	Dutch elm disease > United States.

Evans: US Documents (Annex 5th floor)