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The Lake Superior rocks.
Irving RD. Irving RD. Science. 1883 May 18;1(15):422. doi: 10.1126/science.ns-1.15.422-a. Science. 1883. PMID: 17814667 No abstract available.
The copper-bearing rocks of Lake Superior.
Irving RD. Irving RD. Science. 1883 May 4;1(13):359-60. doi: 10.1126/science.ns-1.13.359-b. Science. 1883. PMID: 17830547 No abstract available.
The copper-bearing rocks of Lake Superior.
Irving RD. Irving RD. Science. 1883 Mar 9;1(5):140-1. doi: 10.1126/science.ns-1.5.140-b. Science. 1883. PMID: 17790308 No abstract available.