TY  - RPRT
TI  - Maps showing lithofacies and inferred sub-surface distribution of channel-fill sand aquifers in the Potomac Group in Fairfax County, Virginia
AU  - Richard H. Johnston
AU  - A.J. Froelich
PY  - 1977
DO  - 10.3133/ofr77287
UR  - https://pubs.usgs.gov/publication/ofr77287
ID  - ofr77287
ER  -