PENNSYLVANIA
GEOLOGICAL SURVEY
FOURTH SERIES
Resources in Coal and Carbonaceous
Shales of Pennsylvania
BY
Chas. R. Fettke,
Associate Professor
of Geology and Mineralogy,
Carnegie Institute of Technology.
DEPARTMENT OF INTERNAL AFFAIRS
James F. Woodward, Secretary
BUREAU OF TOPOGRAPHIC AND GEOLOGICAL SURVEY
George H. Ashley, State Geologist
1923
