| Title | Date | Type | Setname | ||
|---|---|---|---|---|---|
| 176 |
 | Alley Gadd | 1942 | Image/StillImage | ucl_rhc |
| 177 |
 | Along the Yampa River, May 1963 | 1963-05 | Image/StillImage | uum_map_rr |
| 178 |
 | Amtrak P.1 | 1975-08-30 | Image/StillImage | dha_cp |
| 179 |
 | Amtrak P.12 | 1989-04-25 | Image/StillImage | dha_cp |
| 180 |
 | Amtrak P.13 | 1989-05-14 | Image/StillImage | dha_cp |
| 181 |
 | Amtrak P.14 | 1989-04-25 | Image/StillImage | dha_cp |
| 182 |
 | Anasazi cliff dwelling, Mesa Verde National Park | 1930; 1931; 1932; 1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950 | Image | uum_map_rr |
| 183 |
 | Anasazi ruins [1] | 1930; 1931; 1932; 1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950 | Image | uum_map_rr |
| 184 |
 | Anasazi ruins [2] | 1930; 1931; 1932; 1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950 | Image | uum_map_rr |
| 185 |
 | Anasazi storage cists [1] | 1930; 1931; 1932; 1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950 | Image | uum_map_rr |
| 186 |
 | Anasazi storage cists [2] | 1930; 1931; 1932; 1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950 | Image | uum_map_rr |
| 187 |
 | Anasazi storage cists [3] | 1930; 1931; 1932; 1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950 | Image | uum_map_rr |
| 188 |
 | Anasazi storage cists [4] | 1930; 1931; 1932; 1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950 | Image | uum_map_rr |
| 189 |
 | Anasazi storage cists [5] | 1930; 1931; 1932; 1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950 | Image | uum_map_rr |
| 190 |
 | Animas hydroelectric system, Colorado [01] | 1911-10-15 | Image | uum_map |
| 191 |
 | Animas hydroelectric system, Colorado [02] | 1911-10-15 | Image | uum_map |
| 192 |
 | Animas hydroelectric system, Colorado [03] | 1911-10-15 | Image | uum_map |
| 193 |
 | Animas hydroelectric system, Colorado [05] | 1911-10-15 | Image | uum_map |
| 194 |
 | Animas hydroelectric system, Colorado [06] | 1911-10-15 | Image | uum_map |
| 195 |
 | Animas hydroelectric system, Colorado [07] | 1911-10-15 | Image | uum_map |
| 196 |
 | Animas hydroelectric system, Colorado [08] | 1911-10-15 | Image | uum_map |
| 197 |
 | Animas hydroelectric system, Colorado [09] | 1915-11 | Image | uum_map |
| 198 |
 | Animas hydroelectric system, Colorado [10] | 1911-10-15 | Image | uum_map |
| 199 |
 | Animas hydroelectric system, Colorado [38] | 1906 | Image | uum_map |
| 200 |
 | Animas River, Durango | 1925 | Image | uum_map_rr |