TY  - RPRT
TI  - Proceedings of the Workshop on methods and techniques for digitizing cartographic data
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1985
DO  - 10.3133/ofr85307
UR  - https://pubs.usgs.gov/publication/ofr85307
ID  - ofr85307
ER  -