TY  - RPRT
TI  - Ground-water flow direction, water quality, recharge sources, and age, Great Sand Dunes National Monument, south-central Colorado
AU  - Michael G. Rupert
AU  - Niel Plummer
PY  - 2004
DO  - 10.3133/sir20045027
UR  - https://pubs.usgs.gov/publication/sir20045027
ID  - sir20045027
ER  -