TY  - RPRT
TI  - Assessment of characteristics and remedial alternatives for abandoned mine drainage : case study at Staple Bend Tunnel unit of Allegheny Portage Railroad National Historic Site, Cambria County, Pennsylvania, 2004
AU  - Charles A. Cravotta
PY  - 2005
DO  - 10.3133/ofr20051283
UR  - https://pubs.usgs.gov/publication/ofr20051283
ID  - ofr20051283
ER  -