TY  - RPRT
TI  - Preliminary lithogeochemical map showing near-surface rock types in the Chesapeake Bay watershed, Virginia and Maryland
AU  - John D. Peper
AU  - Lucy McCartan
AU  - J. Wright Horton
AU  - James E. Reddy
PY  - 2001
DO  - 10.3133/ofr01187
UR  - https://pubs.usgs.gov/publication/ofr01187
ID  - ofr01187
ER  -