The ancient volcanic rocks of South mountain, Pennsylvania
By: by Florence Bascom.
Series: U.S. Geological survey. Bulletin; no. 136
Publisher: Govt. Print. Off.
Published: 1896
Place of publication: Washington
Language: eng
Number of pages: 124
Subjects: Petrology -- Pennsylvania.; Rocks, Igneous -- Pennsylvania.
Notes: Bibliography : p. 19.
"Literature" : p. 87-91.