TY  - RPRT
TI  - Preliminary bedrock geologic map of the Marlborough quadrangle, Middlesex and Worcester Counties, Massachusetts
AU  - J. Christopher Hepburn
AU  - Richard G. DiNitto
PY  - 1978
DO  - 10.3133/ofr78222
UR  - https://pubs.usgs.gov/publication/ofr78222
ID  - ofr78222
ER  -