Measured section of the palæozoic formations in middle Pennsylvania
By: by Charles A. Ashburner
Published: 1877
Place of publication: Philadelphia?
Language: eng
Number of pages: 42
Subjects: Geology, Stratigraphic, Palaeozoic
Notes: Cover-title.

"Read before the American Philosophical Society, February 16, 1877."

Excerpt: Proceedings of the American Philosophical Society, v. 16, p. 519-560.

Also paged continuously with Proceedings.