TY  - BOOK
AU  - Horton H. Hobbs III, Rickard A Olson, Elizabeth G Winkler, David C. Culver
TI  - Mammoth Cave
SN  - 9783319537184
PB  - Springer
UR  - https://link.springer.com/openurl?genre=book&isbn=978-3-319-53718-4
ER  -