TY  - RPRT
TI  - Thickness of overburden map, Falls Church Quadrangle, Virginia and Maryland
AU  - William S. Kirk
AU  - A.J. Froelich
PY  - 1979
DO  - 10.3133/ofr79395
UR  - https://pubs.usgs.gov/publication/ofr79395
ID  - ofr79395
ER  -