The minerals of Pennsylvania: Iron ores of Pennsylvania
By: by William O. Hickok, IV.
Series: Bulletin M,; 18-B
Publisher: Department of Internal Affairs, Topographic and Geologic Survey
Published: 1939
Place of publication: Harrisburg, Pa
Language: eng
Number of pages: 21
Subjects: Iron ores -- Pennsylvania.
Notes: Bibliographical footnotes.
At head of title: Pennsylvania Geological survey, Fourth series
With Ashley, G. H. The undeveloped mineral resources of Pennsylvania. 1933. (Bulletin M18-A)