- Bankey, Viki, 1992, Complete Bouguer gravity, isostatic residual gravity, and related geophysical maps centered on the Idaho Batholith and Challis volcanic field, northwestern United States: Geophysical Investigation Map 995, 4 maps on 2 sheets :col. ;58 x 66 cm. or smaller, on sheets 81 x 143 cm. or smaller, folded in envelope 30 x 24 cm.,
- Cady, J. W., 1992, Digital topographic map centered on the Idaho Batholith and Challis volcanic field, northwestern United States: Geophysical Investigation Map 996, 1 map :col. ;57 x 66 cm., on sheet 81 x 76 cm., folded in envelope 30 x 24 cm.,
- Case, J. E.; Morin, R. L.; Dickerson, R. P., 1992, Maps showing interpretation of geophysical anomalies of the northwestern Uncompahgre uplift and vicinity, Grand County, Utah, and Mesa County, Colorado: Geophysical Investigation Map 997, 3 maps on 3 sheets ;45 x 69 cm., folded in envelope 30 x 24 cm. +1 booklet (14 p. : ill., maps ; 28 cm.),
- Hildenbrand, T. G.; Kucks, R. P., 1992, Filtered magnetic anomaly maps of Missouri: Geophysical Investigation Map 1000, 4 maps on 2 sheets :col. ;52 x 58 cm., sheets 76 x 127 cm. and 66 x 123 cm., folded in envelope 30 x 24 cm.,
- Hildenbrand, T. G.; Kucks, R. P., 1992, Filtered magnetic anomaly maps of Illinois: Geophysical Investigation Map 999, 4 maps on 2 sheets :col. ;35 x 62 cm., sheets 86 x 79 cm. and 76 x 79 cm., folded in envelope 30 x 24 cm.,
- McCafferty, Anne, 1992, Aeromagnetic maps and terrace magnetization map centered on the Idaho Batholith and Challis volcanic field, northwestern United States: Geophysical Investigation Map 994, 3 maps on 2 sheets :col. ;each 56 x 66 cm., sheets 99 x 145 cm. and 74 x 76 cm., folded in envelope 30 x 24 cm.,
- Peddie, N. W., 1992, The magnetic field in the United States, 1990; declination chart: Geophysical Investigation Map 1002-D, 3 maps on 1 sheet :col., both sides ;61 x 99 cm. or smaller, on sheet 79 x 115 cm.,
- Peddie, N. W., 1992, The magnetic field in the United States, 1990; total intensity chart: Geophysical Investigation Map 1002-F, 3 maps on 1 sheet :col., both sides ;61 x 99 cm. or smaller, on sheet 79 x 115 cm.,
