TY  - RPRT
TI  - Aeromagnetic map of the northeastern United States: In color
AU  - Isidore Zietz
AU  - F. P. Gilbert
PY  - 1981
DO  - 10.3133/gp942
UR  - https://pubs.usgs.gov/publication/gp942
ID  - gp942
ER  -