TY  - RPRT
TI  - Documentation and user's guide to the spatial environmental data digitizing system, SEDDS
AU  - Kenneth J. Lanfear
AU  - Anastase Nakassis
PY  - 1980
DO  - 10.3133/ofr80871
UR  - https://pubs.usgs.gov/publication/ofr80871
ID  - ofr80871
ER  -