TY  - RPRT
TI  - CONTOUR; a modification of G.I. Evenden's general purpose contouring program
AU  - R. H. Godson
AU  - M. W. Webring
PY  - 1982
DO  - 10.3133/ofr82797
UR  - https://pubs.usgs.gov/publication/ofr82797
ID  - ofr82797
ER  -