TY  - RPRT
TI  - Aeromagnetic map of the Hudson quadrangle, Worcester and Middlesex Counties, Massachusetts
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1970
DO  - 10.3133/gp704
UR  - https://pubs.usgs.gov/publication/gp704
ID  - gp704
ER  -