@misc{indiciae6412cc98825f,
  title = {Geologic map of the Tremont quadrangle, Schuylkill and Northumberland Counties, Pennsylvania},
  author = {Gordon H. Wood and J. Peter Trexler},
  year = {1968},
  doi = {10.3133/gq692},
  url = {https://pubs.usgs.gov/publication/gq692},
  note = {Source identifier: gq692}
}