@misc{indiciaef8f0a2558ca5,
  title = {Characteristics and weathering features of sandstone quoins at Fort McHenry, Baltimore Maryland},
  author = {E. S. McGee and M.E. Woodruff},
  year = {1992},
  doi = {10.3133/ofr92541},
  url = {https://pubs.usgs.gov/publication/ofr92541},
  note = {Source identifier: ofr92541}
}