TY  - RPRT
TI  - Geologic map of aggregate resource units for the Baltimore-Washington urban corridor in the Mid-Atlantic region
AU  - C.S. Southworth
AU  - Wayne L. Newell
AU  - T. R. Armstrong
AU  - Peter Hyde
PY  - 1998
DO  - 10.3133/ofr98349
UR  - https://pubs.usgs.gov/publication/ofr98349
ID  - ofr98349
ER  -