A syllabus of Pennsylvania geology and mineral resources
By: by George H. Ashley.
Series: Pennsylvania Geological survey, 4th (1919-   ) Bulletin G1; Bulletin G ;; 1.
Publisher: Department of internal affairs, Topographic and geologic survey
Published: 1931
Place of publication: Harrisburg
Language: eng
Number of pages: 160
Subjects: Geology -- Pennsylvania.; Mines and mineral resources -- Pennsylvania.; Geology -- Pennsylvania -- Bibliography.
Genres: Bibliography.
Notes: "Publications of the present [Pennsylvania] Geological survey": p. 147-150.
"Publications of the second Geological survey": p. 152-154.
"List of U. S. Geological survey publications on Pennsylvania": p. 155-158.