map 1. Isostatic residual gravity map of the Fishhooks Wilderness Study Area, Graham County, Arizona -- map 2. Isostatic residual gravity map of the Black Rock Wilderness Study Area, Graham County, Arizona -- map 3. Isostatic residual gravity map of the Needles Eye Wilderness Study Area, Gila County, Arizona -- map 4. Aeromagnetic map of the Fishhooks Wilderness Study Area, Graham County, Arizona -- map 5. Aeromagnetic map of the Black Rock Wilderness Study Area, Graham County, Arizona -- map 6. Aeromagnetic map of the Needles Eye Wilderness Study Area, Gila County, Arizona