TY  - RPRT
TI  - GSDIG version 3.0; a program to determine latitude, longitude coordinates or X, Y coordinates using a microcomputer (IBM PC or compatible) and a digitizer
AU  - G.I. Selner
AU  - C. L. Smith
AU  - R. B. Taylor
PY  - 1990
DO  - 10.3133/ofr9080
UR  - https://pubs.usgs.gov/publication/ofr9080
ID  - ofr9080
ER  -