TY  - RPRT
TI  - Bedrock geologic map of the Marblehead North quadrangle, Essex County, Massachusetts
AU  - William H. Dennen
PY  - 1991
DO  - 10.3133/gq1693
UR  - https://pubs.usgs.gov/publication/gq1693
ID  - gq1693
ER  -