| Call Number (LC) | Title | Results |
|---|---|---|
| I 19.4/2:129 | Hydrologic reconnaissance of the Green River in Utah and Colorado | 2 |
| I 19.4/2:130 | Index of surface-water records. Part 14. Pacific Slope basins in Oregon and lower Columbia River basin to September 30, 1950 | 1 |
| I 19.4/2:131 | Exploratory drilling in the Prairie du Chien group of the Wisconsin zinc-lead district by the U.S. Geological Survey in 1949-1950 | 2 |
| I 19.4/2:132 |
Geologic construction-material resources in Rawlins County, Kansas by Henry V. Beck and Robert K. McCormack Geologic construction-material resources in Rawlins County, Kansas |
2 |
| I 19.4/2:133 | Detroit River group in the Michigan Basin | 2 |
| I 19.4/2:134 | Index of surface-water records . Part 3. Ohio River Basin to September 30, 1950 | 1 |
| I 19.4/2:135 | Abstracts of the literature on synthesis of apatites and some related phosphates | 2 |
| I 19.4/2:136 | Geology at the site of a proposed dam and reservoir on Power Creek near Cordova, Alaska | 2 |
| I 19.4/2:137 | Uraniferous quartzite, Red Bluff prospect, Gila County, Arizona | 2 |
| I 19.4/2:138 | Index of surface-water records. Part 1. North Atlantic Slope Basins to September 30, 1950 | 1 |
| I 19.4/2:139 | Ground-water resources of the Wood River unit of the lower Platte River basin, Nebraska | 2 |
| I 19.4/2:140 | Index of surface-water records. Part 9. Colorado River Basin to September 30, 1950 | 1 |
| I 19.4/2:141 | Index of surface-water records. Part 10.. The Great Basin to September 30, 1950 | 1 |
| I 19.4/2:142 | Virgin Valley opal district, Humboldt County, Nevada | 2 |
| I 19.4/2:143 | The Hobart Butte high-alumina clay deposit, Lane County, Oregon | 2 |
| I 19.4/2:144 | Index of surface-water records. Part 7. Lower Mississippi River basin to September 30, 1950 | 1 |
| I 19.4/2:146 | A review of the geology and coal resources of the Bering River coal field, Alaska | 2 |
| I 19.4/2:147 | Geology of proposed Blue Lake dam site and tunnel near Sitka, Alaska | 2 |
| I 19.4/2:148 | Water resources of the Atlanta metropolitan area | 2 |
| I 19.4/2:149 | Reports and maps of the Geological Survey released only in the open files, 1949-1950 | 1 |