Illinois State Geological Survey & Illinois. Dept. of Registration and Education. (1926). Illinois petroleum. State Geological Survey.
Chicagoスタイル(17版)引用形式Illinois State Geological Survey , Illinois. Dept. of Registration and Education. Illinois Petroleum. Urbana, Ill.: State Geological Survey, 1926.
MLA(8版)引用形式Illinois State Geological Survey , Illinois. Dept. of Registration and Education. Illinois Petroleum. State Geological Survey, 1926.
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