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Oil and gas development in Illinois in 1939 /
by Alfred H. Bell and George V. Cohee.

APA Citation

Bell, A. Hannam., Cohee, G. Vincent., Illinois State Geological Survey. (1940). Oil and gas development in Illinois in 1939. Urbana: Illinois State Geological Survey.

MLA Citation

Bell, Alfred Hannam, 1895-, George Vincent Cohee, and Illinois State Geological Survey. Oil And Gas Development In Illinois In 1939. Urbana: Illinois State Geological Survey, 1940.

Warning: These citations may not always be complete (especially for serials).