Progress-report upon Geographical and geological explorations and surveys west of the one hundredth meridian, in 1872, under the direction of Brig. Gen. A. A. Humphreys, chief of engineers, United States army
| Format | Electronic |
| Publication Info | [S.l.] : Govt. Print. Off., |
| Supplemental Content | Full text available from Making of America Books |
| General note | Title from content provider. |
| Access restriction | Available only to authorized users. |
| Technical details | Mode of access: World Wide Web |
| Genre/form | Electronic books. |