@misc{indiciaece211d2f3c82,
  title = {Geologic map of the Washington West 30’ × 60’ quadrangle, Maryland, Virginia, and Washington D.C.},
  author = {Peter T. Lyttle and John N. Aleinikoff and William C. Burton and E. Allen Crider and Avery A. Drake and Albert J. Froelich and J. Wright Horton and Gregorios Kasselas and Robert B. Mixon and Lucy McCartan and Arthur E. Nelson and Wayne L. Newell and Louis Pavlides and David S. Powars and C. Scott Southworth and Robert E. Weems},
  year = {2018},
  doi = {10.3133/ofr20171142},
  url = {https://pubs.usgs.gov/publication/ofr20171142},
  note = {Source identifier: ofr20171142}
}