TY  - RPRT
TI  - Outdoors America: recreational opportunites on public lands
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1992
DO  - 10.3133/70039580
UR  - https://pubs.usgs.gov/publication/70039580
ID  - 70039580
ER  -