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Google圖書搜尋
Twelve Ore Deposits of Bulgaria
International Association on the Genesis of Ore Deposits
其他書名
International Association of Genesis of Ore Deposits, 4th Symposium, Varna, '74
出版
Sofiĭski univesitet "Kl. Okhridski"
, 1974
URL
http://books.google.com.hk/books?id=6PAKAQAAMAAJ&hl=&source=gbs_api