Browse by Subject "Rocks"
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Abstracts of papers dealing with rock and rock products, presented at the third annual Mineral Industries Conference of Illinois, May 17-18, 1935. (Urbana,, 1935)
Research on the state's mineral resources and their utilization. abstract reports of general session, forum on researches in progress, and symposium on needed researches (Urbana, Ill. : Illinois State Geological Survey,, 1936)