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Google圖書搜尋
Overburden Analyses and Strip-mine Conditions in the Northwestern District of the Ohio Coal-mining Region
Gustaf Adolph Limstrom
Robert William Merz
出版
Central States Forest Experiment Station, Forest Service, U.S. Department of Agriculture
, 1951
URL
http://books.google.com.hk/books?id=bV1VzgEACAAJ&hl=&source=gbs_api