TY  - RPRT
TI  - Bedrock geologic map of the Gloucester and Rockport quadrangles, Essex County, Massachusetts
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1992
DO  - 10.3133/i2285
UR  - https://pubs.usgs.gov/publication/i2285
ID  - i2285
ER  -