TY  - RPRT
TI  - Progress toward a preliminary karst depression density map for the conterminous United States
AU  - Daniel H. Doctor
AU  - Jeanne M. Jones
AU  - Nathan J. Wood
AU  - Jeff T. Falgout
AU  - Natalya Igorevna Rapstine
PY  - 2020
DO  - 10.5038/9781733375313.1003
UR  - https://pubs.usgs.gov/publication/70217880
ID  - 70217880
ER  -