TY  - RPRT
TI  - The Piedmont landscape of Maryland: a new look at an old problem.
AU  - J. E. Costa
AU  - E.T. Cleaves
PY  - 2006
DO  - 10.1002/esp.3290090107
UR  - https://pubs.usgs.gov/publication/70013916
ID  - 70013916
ER  -