TY  - RPRT
TI  - Geologic history of the Black Hills caves, South Dakota
AU  - Arthur N. Palmer
AU  - Margaret Palmer
AU  - James B. Paces
PY  - 2016
DO  - 10.1130/2015.2516(07)
UR  - https://pubs.usgs.gov/publication/70169113
ID  - 70169113
ER  -