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RIDGE, John Drew
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Author: RIDGE (John Drew)
c9I• :c RIDGE (John Drew). The Genesis of the tn—state zino and. lead. ores: a. part o± a dissertation submitted to (the University of Chicago)...in candidacy for the degree of 1)ootor of Philosophy... 1935. Ieprinted from Economic Geology, Vol. I, No. 3, 1936. p. (3) ÷ 298-313. Diagram and table. 0 8 . Chicago, 1936.
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