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I.C. 8887, Bureau of Mines minerals availability system: an update of information circular 8654

H. R. Babitzke

出版	Bureau of Mines, 1982
URL	http://books.google.com.hk/books?id=D3fHzwEACAAJ&hl=&source=gbs_api

註釋

With the advances in data processing technology and through the consolidation of the Bureau's data collection and analysis expertise since publication of Information Circular 8654, several changes have been made in the system. It.