Product Type
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Published by United States Government Printing Office, Washington, 1975
Seller: Bluebird Books (RMABA, IOBA), Littleton, CO, U.S.A.
Stapled wraps. Condition: Very Good. A single USGS booklet covering two studies of the means and practicality of mining copper deposits. With tables, charts and a few black & white photos. --- In grey stapled wraps with an array of images of various metallic ore samples. --- With color highlighting on one page in the second study, otherwise a clean, bright, unmarked copy.; Quarto - 11 to 13 in. tall; vii, 11, iii, 26 pages.
Published by United States Government Printing Office, Washington, D.C., 1975
Condition: near fine. An Analysis of the relationships between grades and tonnages of three types of copper deposits-- porphyry, massive sulfide, and strata-bound DN1. stapled binding, pages clean, binding very good, illustrated, indexed.