TY  - RPRT
TI  - Thickness of overburden map, Howard County, Maryland
AU  - J.B. Roen
AU  - A.J. Froelich
PY  - 1978
DO  - 10.3133/mf772b
UR  - https://pubs.usgs.gov/publication/mf772B
ID  - mf772B
ER  -