"Aeromagnetic prospecting." . . "Alaska." . . "Aeromagnetic prospecting Alaska." . . . . "Geological Survey (U.S.)" . . . . . . . "Contains compilation of 7 USGS directories of digital grids and plot fields based on 96 aeromagnetic surveys flown in Alaska between 1945 and 1994. [There is no software on this disc.]."@en . . . . "Alaska aeromagnetic compilation digital grids and survey data"@en . "Alaska aeromagnetic compilation digital grids and survey data" . . . . . . . . . . . . "Maps"@en . . . . . "Contains Alaska aeromagnetic data, descriptive text, and figures. The digital data, grids, and plot files are based on 96 aeromagnetic surveys flown in Alaska between 1945 and 1994. The CD contains HPGL plot files and some GIF images for color-shaded relief contour maps of the gridded data at scales of 1:2,500,000 and 1:500,000." . . "Geomagnetism." . . "Geomagnetism Alaska." . .