TY  - RPRT
TI  - Preliminary geologic map of the Middletown quadrangle, Frederick and Shenandoah Counties, Virginia
AU  - Randall C. Orndorff
AU  - Jack Burton Epstein
AU  - R. C. McDowell
PY  - 1993
DO  - 10.3133/ofr9324
UR  - https://pubs.usgs.gov/publication/ofr9324
ID  - ofr9324
ER  -