TY  - RPRT
TI  - An evaluation of the effects of acid rain on low conductivity headwater streams in Pennsylvania
AU  - John R. Ritter
AU  - Ann E. Brown
PY  - 1981
DO  - 10.3133/ofr811025
UR  - https://pubs.usgs.gov/publication/ofr811025
ID  - ofr811025
ER  -