@misc{indiciae955f74df9f1d,
  title = {Water-quality study of Tulpehocken Creek, Berks County, Pennsylvania, prior to impoundment of Blue Marsh Lake},
  author = {James L. Barker},
  year = {1977},
  doi = {10.3133/wri7755},
  url = {https://pubs.usgs.gov/publication/wri7755},
  note = {Source identifier: wri7755}
}