@misc{indiciae5515743f6da9,
  title = {GSMARC, a program and procedure to convert GSMAP data bases into ARC/INFO coverages, GSDARC : a counterpart program for GSDRAW data bases and an ARC/INFO procedure to topologically structure resultant data},
  author = {Gregory N. Green and G.I. Selner},
  year = {1988},
  doi = {10.3133/ofr88430a},
  url = {https://pubs.usgs.gov/publication/ofr88430A},
  note = {Source identifier: ofr88430A}
}