- Jillson, Willard Rouse, 1890-1975
- Digital Commonwealth
- Boston Public Library
- Kentucky Geological Survey
Includes index of productive oil and gas fields, 1 cross section, and statistics for oil and coal production. Geologic and developmental data prepared by the Kentucky Geological Survey and revised, expanded, and corrected to June 1920. By Willard Rouse Jillson ; base computed and drafted in 1917 by Lucien M. Sellier ; Kentucky Geological Survey.
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