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Google圖書搜尋
An Aerial Test of Orthene Against the Larch Casebearer
Richard I. Washburn
出版
Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station
, 1977
URL
http://books.google.com.hk/books?id=rjBZ0AEACAAJ&hl=&source=gbs_api