How to save Dutch elm diseased trees by pruning

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100	1	⊔	‡aAllison, James R.
245	1	0	‡aHow to save Dutch elm diseased trees by pruning / ‡cJ. R. Allison, G. F. Gregory.
260	⊔	⊔	‡a[Broomall, Pa.] : ‡bDept. of Agriculture, Forest Service, Northeastern Area, State and Private Forestry, ‡c1979.
265	⊔	⊔	‡a19008
300	⊔	⊔	‡a[6] p. : ‡bcol. ill. ; ‡c23 x 11 cm.
500	⊔	⊔	‡aIssued Nov. 1979.
500	⊔	⊔	‡a"NA-GR-9."
504	⊔	⊔	‡aBibliography: p. [4].
538	⊔	⊔	‡aMode of access: Internet.
650	⊔	0	‡aPruning.
650	⊔	0	‡aDutch elm disease ‡zUnited States.
700	1	⊔	‡aGregory, G. F.
710	1	⊔	‡aUnited States. ‡bForest Service. ‡bNortheastern Area, State and Private Forestry.
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