TY  - RPRT
TI  - Conterminous U.S. land cover characteristics data set 1990 prototype
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1993
DO  - 10.3133/25172
UR  - https://pubs.usgs.gov/publication/25172
ID  - 25172
ER  -