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Google圖書搜尋
Composition of Three Fossil Woods Mined from the Miocene Auriferous Gravels of California
George J. Ritter
R. L. Mitchell
出版
U.S. Department of Agriculture, Forest Service, Forest Products Laboratory
, 1934
URL
http://books.google.com.hk/books?id=3Gn1zwEACAAJ&hl=&source=gbs_api