TY  - RPRT
TI  - POLYGON; an interactive program for constructing and editing the geometries of polygons using a color graphics terminal
AU  - B. A. Chuchel
PY  - 1985
DO  - 10.3133/ofr85233a
UR  - https://pubs.usgs.gov/publication/ofr85233A
ID  - ofr85233A
ER  -