Comparison of the triangular, polygonal, and a statistical method of computing grade and tonnage of ore for the Silver Bell Oxide porphyry copper deposit

Author: Hewlett, Richard F.
Year: 1970
Document Type: BMRA
Issuing Agency: U.S. Dept. of Interior, Bureau of Mines,
SUDOC: I 28.23:7331
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 7331
Subject: Copper ores--Grading
Link: https://hdl.handle.net/2027/mdp.39015078532317

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