Search Results - Illinois State Geological Survey. Educational Extension Division
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Mineral industries of Illinois Revised January 1, 1961. by Illinois State Geological Survey. Educational Extension Division
Published: State of Illinois, Dept. of Registration and Education, Division of the State Geological Survey, 1961“…Illinois State Geological Survey. Educational Extension Division…”Description: 1 map : color ; on sheet 130 x 76 cm folded to 31 x 22 cm.
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