Second Geological Survey of Pennsylvania: Report of Progress. P. Vol. III.
| Image |  |
|---|---|
| Description | |
| Author/s |
author: Leo Lesquereux |
| Publication date | 1884 |
| Language | English |
| Country of origin | United States |
| Wikipedia link | |
| Copyright status |
public domain in United States. |
| Missing/wrong data? | Edit Wikidata item |