TY  - RPRT
TI  - Unexpected hydrologic perturbation in an abandoned underground coal mine: Response to surface reclamation?
AU  - D. Harper
AU  - G.A. Olyphant
AU  - E.J. Hartke
PY  - 1990
DO  - 10.1007/bf01706409
UR  - https://pubs.usgs.gov/publication/70016161
ID  - 70016161
ER  -