TY  - RPRT
TI  - SCRNDIG a BASIC program for digitizing from a screen image on a DOS-based computer
AU  - Philip S. Powers
AU  - Giovanni Crosta
PY  - 1992
DO  - 10.3133/ofr92522a
UR  - https://pubs.usgs.gov/publication/ofr92522A
ID  - ofr92522A
ER  -