Topic summary
Potomac Formation
Extracted from the Wikipedia article Potomac Group.
References
- ^ . Bulletin of the Peabody Museum of Natural History. 59 (1): 95–105. doi:10.3374/014.058.0210. ISSN 0079-032X.
- ^ 94. doi:10.2475/ajs.se-305.205.89.
- ^ 188.
- ^.