Title
The Horizon of the South Valley Hill Rocks in Pennsylvania
By
Frazer, Persifor, 1844-1909
Original Publication
Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
Series / Issue
Issue: 112
Published by
Philadelphia, American Philosophical Society,
Identifiers
BioStor:
https://biostor.org/reference/202911
JSTOR:
982703