TY  - RPRT
TI  - Acid-rock drainage at Skytop, Centre County, Pennsylvania, 2004
AU  - Jane M. Hammarstrom
AU  - Keith Brady
AU  - Charles A. Cravotta
PY  - 2005
DO  - 10.3133/ofr20051148
UR  - https://pubs.usgs.gov/publication/ofr20051148
ID  - ofr20051148
ER  -