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Google圖書搜尋
Geology of the Botolan Copper Mine, Botolan, Zambales
Arthur Rudolph Kinkel
Sisenando Samaniego
出版
Republic of the Philippines, Department of Agriculture and Natural Resources, Bureau of Mines
, 1956
URL
http://books.google.com.hk/books?id=uzQkcTRMeNwC&hl=&source=gbs_api