How to estimate defoliation and predict tree damage

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100	1	0	‡aWickman, Boyd E.
245	1	0	‡aHow to estimate defoliation and predict tree damage / ‡cby B.E. Wickman.
260	0	⊔	‡aWashington, D.C. : ‡bDept. of Agriculture, Combined Forest Pest Research and Development Program, ‡c1979.
265	⊔	⊔	‡a20402
300	⊔	⊔	‡a15 p. : ‡bill. (some col.), charts ; ‡c24 cm.
490	⊔	0	‡aAgriculture handbook (United States. Dept. of Agriculture) ; ‡vno. 550
490	⊔	0	‡aDouglas-fir tussock moth handbook.
504	⊔	⊔	‡aBibliography: p. 15.
538	⊔	⊔	‡aMode of access: Internet.
650	⊔	0	‡aDefoliation
650	⊔	0	‡aDouglas-fir tussock moth
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