TY  - RPRT
TI  - Geologic and anthropogenic factors influencing karst development in the Frederick region of Maryland
AU  - D. K. Brezinski
PY  - 2007
DO  - 10.1306/eg.01050605014
UR  - https://pubs.usgs.gov/publication/70032857
ID  - 70032857
ER  -