TY  - RPRT
TI  - Aeromagnetic map of the Lawrence quadrangle, Essex and Middlesex Counties, Massachusetts, and Rockingham and Hillsborough Counties, New Hampshire
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1970
DO  - 10.3133/gp716
UR  - https://pubs.usgs.gov/publication/gp716
ID  - gp716
ER  -