TY  - RPRT
TI  - Geologic map of Loudoun County, Virginia
AU  - W. C. Burton
AU  - A.J. Froelich
AU  - J.S. Schindler
AU  - C.S. Southworth
PY  - 1993
DO  - 10.3133/ofr92716
UR  - https://pubs.usgs.gov/publication/ofr92716
ID  - ofr92716
ER  -