TY  - RPRT
TI  - Episodic acidification and changes in fish diversity in Pennsylvania headwater streams
AU  - R.M. Heard
AU  - W.E. Sharpe
AU  - R.F. Carline
AU  - William G. Kimmel
PY  - 1997
DO  - 10.1577/1548-8659(1997)126<0977:eaacif>2.3.co;2
UR  - https://pubs.usgs.gov/publication/70019558
ID  - 70019558
ER  -