At head of title: State of Illinois. Department of Registration and Education. Division of the State Geological Survey."Reprinted from the Journal of the American Ceramic Society, vol. 24, no. 1, pp. 23-28, 1941."Includes bibliographical references
Reprinted from the American Mineralogist, 30, (1945).Includes bibliographical references (p. 713)
At head of title: State of Illinois. Department of registration and education. State geological surv...
At head of title: State of Illinois. Department of registration and education. Division of the State...
At head of title: State of Illinois. Department of Registration and Education. Division of the State...
At head of title: State of Illinois. Department of Registration and Education. Division of the State...
At head of title: State of Illinois ... Dept. of registration and education ... Division of the Stat...
At head of title: State of Illinois. Department of Registration and Education. Division of the State...
Includes bibliographical references."Reprinted from the Journal of Geology, vol. 56, no. 1, January,...
At head of title: State of Illinois. Department of Registration and Education. Division of the State...
At head of title: State of Illinois ... Department of registration and education ... Division of the...
"From the Annual report of the chief to the director, Department of registration and education for f...
"Nineteenth Annual Meeting, North-Central Section of the Geological Society of America, Northern Ill...
At head of title: State of Illinois, Dwight H. Green, governor. Dept. of registration and education,...
"Reprinted from the Transactions, Illinois State Academy of Science, vol. 36, no. 2, December, 1943....
At head of title: State of Illinois, Dwight H. Green, Governor. Dept. of Registration and Education,...
Reprinted from the American Mineralogist, 30, (1945).Includes bibliographical references (p. 713)
At head of title: State of Illinois. Department of registration and education. State geological surv...
At head of title: State of Illinois. Department of registration and education. Division of the State...
At head of title: State of Illinois. Department of Registration and Education. Division of the State...
At head of title: State of Illinois. Department of Registration and Education. Division of the State...
At head of title: State of Illinois ... Dept. of registration and education ... Division of the Stat...
At head of title: State of Illinois. Department of Registration and Education. Division of the State...
Includes bibliographical references."Reprinted from the Journal of Geology, vol. 56, no. 1, January,...
At head of title: State of Illinois. Department of Registration and Education. Division of the State...
At head of title: State of Illinois ... Department of registration and education ... Division of the...
"From the Annual report of the chief to the director, Department of registration and education for f...
"Nineteenth Annual Meeting, North-Central Section of the Geological Society of America, Northern Ill...
At head of title: State of Illinois, Dwight H. Green, governor. Dept. of registration and education,...
"Reprinted from the Transactions, Illinois State Academy of Science, vol. 36, no. 2, December, 1943....
At head of title: State of Illinois, Dwight H. Green, Governor. Dept. of Registration and Education,...
Reprinted from the American Mineralogist, 30, (1945).Includes bibliographical references (p. 713)
At head of title: State of Illinois. Department of registration and education. State geological surv...
At head of title: State of Illinois. Department of registration and education. Division of the State...
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