TY  - RPRT
TI  - GSDIG version 2.0; a program to determine latitude/longitude coordinates, and GSDXY version 1.0, a counterpart program to determine X, Y coordinates, using a microcomputer (IBM PC or compatible) and digitizer
AU  - Gary I. Selner
AU  - Cole L. Smith
AU  - Richard B. Taylor
PY  - 1988
DO  - 10.3133/ofr88428a
UR  - https://pubs.usgs.gov/publication/ofr88428A
ID  - ofr88428A
ER  -