@misc{indiciaea02b62588f01,
  title = {E2MCOD; a program to determine and list Digital Line Graph (DLG) line attributes from a CD-ROM titled 1:2,000,000-scale digital line graph (DLG) and E2MGSM; a program to retrieve DLG line data from a CD-ROM titled 1:2,000,000-Scale digital line graph and convert those data to a GSMAP database},
  author = {G.I. Selner and J. D. Hoffman},
  year = {1991},
  doi = {10.3133/ofr91345},
  url = {https://pubs.usgs.gov/publication/ofr91345},
  note = {Source identifier: ofr91345}
}