TY  - RPRT
TI  - Geologic map of the Seneca quadrangle, Montgomery County, Maryland, and Fairfax and Loudoun Counties, Virginia
AU  - Avery Ala Drake
AU  - Scott Southworth
AU  - K. Y. Lee
PY  - 1999
DO  - 10.3133/gq1802
UR  - https://pubs.usgs.gov/publication/gq1802
ID  - gq1802
ER  -