TY  - RPRT
TI  - Preliminary geologic map of the Beltsville quadrangle, Prince Georges, Montgomery, and Howard Counties, Maryland
AU  - C. F. Withington
AU  - A.J. Froelich
PY  - 1974
DO  - 10.3133/mf582
UR  - https://pubs.usgs.gov/publication/mf582
ID  - mf582
ER  -