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Second Pan American Congress of Mining Engineering and Geology, Petropolis, Brazil, October 1 to 16, 1946
United States. Delegation to the Pan American Congress of Mining Engineering and Geology
其他書名
Report
出版U.S. Section, Pan American Institute of Mining Engineering and Geology, 1947
URLhttp://books.google.com.hk/books?id=ysoHf6UuXm0C&hl=&source=gbs_api
EBookFULL_PUBLIC_DOMAIN