TY  - RPRT
TI  - Aeromagnetic map of the East Brookfield quadrangle, Worcester County, Massachusetts
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1968
DO  - 10.3133/gp621
UR  - https://pubs.usgs.gov/publication/gp621
ID  - gp621
ER  -