Feldspar in Illinois sands, a study of resources, by H. B. Willman. Printed by authority of the state of Illinois.
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TextPublication details: Urbana, Illinois, 1942.Description: 87 p. illusSubject(s): LOC classification: - TN948.F3 W5
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At head of title: State of Illinois, Dwight H. Green, Governor. Dept. of Registration and Education, Frank G. Thompson, Director. Division of the State Geological Survey, M. M. Leighton, Chief, Urbana.
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