Oil Investigations in Illinois in 1914. Area South of the Colmar Oil Field, by William C. Morse and Fred H. Kay. The Coolmar Oil Field--a Restudy, by William C. Morse and Fred H. Kay. The Allendale Oil Field, by John L. Rich. Anticlinal Structure in Randolph County, by Stuart Weller. Oil and Gas in Gillespie and Mt. Olive Quadrangles, by Wallace Lee. Work in Cooperation with U S. Geological…

Illinois State Geological Survey.