Sisler, J. D. 1., Sisler, J. D., Hickok, W. O., Mayer, F. T., & Ashley, G. H. (1933). Contributions to oil and gas geology of Western Pennsylvania. Harrisburg, PA: Dept. of internal affairs, Topographic and geologic survey.

Sisler, James D. 1894-, James Donaldson Sisler, Wm. O. Hickok, F. T. Mayer, and Geo. H. Ashley. Contributions to Oil and Gas Geology of Western Pennsylvania. Harrisburg, PA: Dept. of internal affairs, Topographic and geologic survey, 1933.

Sisler, James D. 1894-, et al. Contributions to Oil and Gas Geology of Western Pennsylvania. Harrisburg, PA: Dept. of internal affairs, Topographic and geologic survey, 1933.