TY  - RPRT
TI  - Aeromagnetic map of the Ludlow quadrangle, Hampden and Hampshire Counties, Massachusetts
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1968
DO  - 10.3133/gp619
UR  - https://pubs.usgs.gov/publication/gp619
ID  - gp619
ER  -