TY  - RPRT
TI  - Aeromagnetic map of Delaware, Maryland, Pennsylvania, West Virginia, and parts of New Jersey, and New York
AU  - Isidore Zietz
AU  - F. P. Gilbert
AU  - J. R. Kirby
PY  - 1980
DO  - 10.3133/gp927
UR  - https://pubs.usgs.gov/publication/gp927
ID  - gp927
ER  -