TY  - RPRT
TI  - Digital geologic map and database of the Frederick 30 x 60 minute quadrangle, Maryland, Virginia, and West Virginia
AU  - Scott Southworth
AU  - David K. Brezinski
AU  - Avery Drake
AU  - William C. Burton
AU  - Randall C. Orndorff
AU  - Albert J. Froelich
AU  - James E. digital compilation by Reddy
AU  - Danielle Denenny
PY  - 2002
DO  - 10.3133/ofr02437
UR  - https://pubs.usgs.gov/publication/ofr02437
ID  - ofr02437
ER  -