Aero Service Corporation, 1965, Preliminary interpretation report, airborne magnetometer
survey of northwestern Iowa: Iowa Geological Survey Report AS-3, 30 p.
(Maps are not available, see GP-910.)
Aero Service Corporation, 1968, Preliminary interpretation report, airborne magnetometer
survey of northeastern Iowa: Iowa Geological Survey Report AS-5, 26 p.
(Maps are not available, see GP-910.)
Aero Service Corporation, 1969, Preliminary interpretation report, airborne magnetometer
survey of east-central Iowa: Iowa Geological Survey Report AS-4, 19 p.
(Maps are not available, see GP-910.)
Aero Service Corporation, 1970, Preliminary interpretation report, airborne magnetometer
survey of southeastern Iowa: Iowa Geological Survey Report AS-6, 19 p.
(Maps are not available, see GP-910.)
Briggs, I.C., 1974, Machine contouring using minimum curvature: Geophysics, v.
39, no. 1, p. 39-48.
Cordell, Lindrith, Keller, G.R., and Hildenbrand, T.G., 1982, Bouguer gravity
map of the Rio Grande Rift, Colorado, New Mexico, and Texas: U.S. Geological
Survey Geophysical Investigations Series Map GP-949, scale 1:1,000,000.
Cordell, Lindrith, Phillips, J.D., and Godson, R.H., 1992, U.S. Geological Survey
potential-field geophysical software, version 2.0: U.S. Geological Survey
Open-File Report 92-18A-G, 16 p., six 3.5-inch diskettes.
Henderson, J.R., White, W.S., and Zietz, I., 1963, Preliminary interpretation
of an aeromagnetic survey of north-central Iowa: Iowa Geological Survey Report
AS-1, 27 p.
Henderson, J.R., Zietz, I., and White, W.S., 1964, Preliminary interpretation
of an aeromagnetic survey in central and southwestern Iowa: Iowa Geological
Survey Report AS-2, 20 p.
Henderson, J.R., and Vargo, J.L., 1965, Aeromagnetic map of central Iowa: U.S.
Geological Survey Geophysical Investigations Map GP-476, scale 1:316,800.
Hittleman, A.D., Dater, D., Buhmann, R., and Racey, S., 1994, Gravity CD-ROM
and User's Manual (1994 Edition): Boulder, Colorado; National Oceanic and
Atmospheric Administration, National Geophysical Data Center.
International Association of Geodesy, 1967, Geodetic Reference System, 1967:
International Association of Geodesy Special Publication 3, 74 p.
Lockwood, Kessler, and Bartlett, Inc., 1973, Preliminary interpretation report,
airborne magnetometer survey of southern Iowa: Iowa Geological Survey Report
AS-7, 17 p. (Maps are not available, see GP-910.)
Iowa Division of Geology and Land Survey, 1970, Aeromagnetic contour map, total
intensity, Marshall 1 quadrangle, Iowa: Iowa Division of Geology and Land
Survey Map, scale 1:62,500.
Morelli, Carlo, ed., 1974, The International Gravity Standardization Net, 1971:
International Association of Geodesy Special Publication 4, 194 p.
Plouff, Donald, 1977, Preliminary documentation for a FORTRAN program to compute
gravity terrain corrections based on topography digitized on a geographic
grid: U.S. Geological Survey Open-File Report 77-535, 45 p.
U.S. Geological Survey and Iowa Geological Survey, 1976, Aeromagnetic map of
Iowa: U.S. Geological Survey Geophysical Investigations Map GP-910, scale
1:500,000.
U.S. Geological Survey, 1999, Digitized aeromagnetic datasets for the conterminous
United States, Hawaii, and Puerto Rico: U.S. Geological Survey Open-File
Report 99-0557, available also at URL https://pubs.usgs.gov/of/1999/ofr-99-0557/html/mag_home.htm.
Webring, Michael, 1982, MINC, a gridding program based on minimum curvature:
U.S. Geological Survey Open-File Report 81-1224, 43 p.
