| Title | Date | Type | Setname | ||
|---|---|---|---|---|---|
| 1026 |
 | Offices, Canyon Camp, Interior | 1911-08 | Image | dha_scp |
| 1027 |
 | Oil field, Byron, Wyoming | 1907; 1908; 1909; 1910; 1911; 1912; 1913; 1914; 1915; 1916; 1917; 1918; 1919; 1920; 1921; 1922; 1923; 1924; 1925; 1926; 1927; 1928; 1929; 1930; 1931; 1932; 1933; 1934; 1935 | Image/StillImage | uum_map |
| 1028 |
 | Oil Industry-Hi-Lite Oil Field P.4 | Image | dha_cp | |
| 1029 |
 | Oil Industry-Hi-Lite Oil Field P.1 | Image | dha_cp | |
| 1030 |
 | Oil Industry-Hi-Lite Oil Field P.2 | Image | dha_cp | |
| 1031 |
 | Oil Industry-Hi-Lite Oil Field P.3 | Image | dha_cp | |
| 1032 |
 | Oil well, Byron, Wyoming [01] | 1907; 1908; 1909; 1910; 1911; 1912; 1913; 1914; 1915; 1916; 1917; 1918; 1919; 1920; 1921; 1922; 1923; 1924; 1925; 1926; 1927; 1928; 1929; 1930; 1931; 1932; 1933; 1934; 1935 | Image/StillImage | uum_map |
| 1033 |
 | Oil well, Byron, Wyoming [02] | 1907; 1908; 1909; 1910; 1911; 1912; 1913; 1914; 1915; 1916; 1917; 1918; 1919; 1920; 1921; 1922; 1923; 1924; 1925; 1926; 1927; 1928; 1929; 1930; 1931; 1932; 1933; 1934; 1935 | Image/StillImage | uum_map |
| 1034 |
 | Oil well, Byron, Wyoming [03] | 1907; 1908; 1909; 1910; 1911; 1912; 1913; 1914; 1915; 1916; 1917; 1918; 1919; 1920; 1921; 1922; 1923; 1924; 1925; 1926; 1927; 1928; 1929; 1930; 1931; 1932; 1933; 1934; 1935 | Image/StillImage | uum_map |
| 1035 |
 | Oil well, Byron, Wyoming [04] | 1907; 1908; 1909; 1910; 1911; 1912; 1913; 1914; 1915; 1916; 1917; 1918; 1919; 1920; 1921; 1922; 1923; 1924; 1925; 1926; 1927; 1928; 1929; 1930; 1931; 1932; 1933; 1934; 1935 | Image/StillImage | uum_map |
| 1036 |
 | Oiti - Second Chief (Shoshone) | 1883; 1884; 1885; 1886; 1887 | Image/StillImage | uaida_main |
| 1037 |
 | Old Faithful | 1911-08 | Image | dha_scp |
| 1038 |
 | Old Faithful | 1911-08 | Image | dha_scp |
| 1039 |
 | Old Faithful - Upper Geyser Basin | 1908; 1909 | Image | dha_scp |
| 1040 |
 | Old Faithful Geyser | 1910-10-02 | Image | dha_scp |
| 1041 |
 | Old Faithful Geyser | 1909-09 | Image | dha_scp |
| 1042 |
 | Old Faithful Geyser, National Park, Wyoming | 1920; 1921; 1922; 1923; 1924 | uum_map | |
| 1043 |
 | Old Faithful Inn | 1908; 1904; 1905; 1906; 1907; 1909; 1910; 1911; 1912 | Image | dha_scp |
| 1044 |
 | Old Faithful Inn - Upper Geyser Basin | 1908-08-16 | Image | dha_scp |
| 1045 |
 | On the easy route. 2000 ft. fresh air below | 1936 | uum_map | |
| 1046 |
 | On the River, Cid Ricketts Sumner on boat. | 1955 | Image | uum_map_rr |
| 1047 |
 | On top, Ranger Petzolt, leader | 1936 | uum_map | |
| 1048 |
 | Oregon Short Line Railroad Ad P.1 | Image | dha_cp | |
| 1049 |
 | Organochlorine compounds and trace elements in streambed sediment and fish tissue, South Platte River Basin; Colorado, Nebraska, and Wyoming | 1997 | Text | wwdl_er |
| 1050 |
 | Osprey (090522-S02) | 2009-05-22 | Sound | uu_wss |