TY  - RPRT
TI  - Bedrock geologic map of the Grafton quadrangle, Worcester County, Massachusetts
AU  - Gregory J. Walsh
AU  - John N. Aleinikoff
AU  - Michael J. Dorais
PY  - 2011
DO  - 10.3133/sim3171
UR  - https://pubs.usgs.gov/publication/sim3171
ID  - sim3171
ER  -