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Using Unequal Sample Interval Lengths and Weighted Averages in Estimating Grade of Ore for Bedded Deposits

Scott Wike Hazen (Jr.)George W. Gladfelter

出版	Bureau of Mines, 1964
URL	http://books.google.com.hk/books?id=mPPCa6qGIEoC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN