Digitized Aeromagnetic Datasets for the Conterminous United States, Hawaii, and Puerto Rico

Online link http://pubs.usgs.gov/of/1999/ofr-99-0557/html/mag_home.htm
Description Aeromagnetic anomaly values digitized from older surveys
Originators U.S. Geological Survey
Publication U.S. Geological Survey Open-File Report 99-557