TY  - RPRT
TI  - An interactive program to display user-generated or file-based maps on a personal computer monitor
AU  - W. H. Langer
AU  - R.W. Stephens
PY  - 1987
DO  - 10.3133/ofr87676
UR  - https://pubs.usgs.gov/publication/ofr87676
ID  - ofr87676
ER  -