TY  - RPRT
TI  - Percent-slope map showing historical anthracite coal-mining infrastructure at the northern end of the Lackawanna syncline, Wayne, Susquehanna, and Lackawanna Counties, Pennsylvania
AU  - Gregory J. Walsh
AU  - Mark C. Walsh
PY  - 2023
DO  - 10.3133/sim3507
UR  - https://pubs.usgs.gov/publication/sim3507
ID  - sim3507
ER  -