| | Title | Date | Type |
|---|
| 276 |  | Men's Downhill | 2005-02-06 | Image/MovingImage; Sound |
| 277 |  | Mervin: The Mockumentary. Nate Millard board sports collection | 1999 | Image/MovingImage |
| 278 |  | Merwin Shumway, Blanding, UT: Uranium Oral Histories | 1970-08-02 | Sound |
| 279 | | Message from an associate of Dr. Fayez Sayegh, May 5, 1967, sending a recording of a "Meet the Press" program | 1967-05-05 | Sound |
| 280 | | Michael Benson, Shiprock, NM: Uranium Oral Histories | 1970-07-30 | Sound |
| 281 | | Michael Reinhardt, Grand Junction, CO: Uranium Oral Histories | 1970-07-29 | Sound |
| 282 |  | Monument Valley. Norman D. and Doris Nevills collection | 1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949 | Image/MovingImage |
| 283 | | Motorized Recreation Sierra Club, et al. vs Forest Service. Save Our Canyons collection | 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013 | Sound |
| 284 | | Mr. and Mrs. Leonard O. Davis, Casa Grande, AZ: Uranium Oral Histories, interview 1 | 1971-01-22 | Sound |
| 285 | | Mr. and Mrs. Leonard O. Davis, Casa Grande, AZ: Uranium Oral Histories, interview 2 | 1971-01-22 | Sound |
| 286 | | Mr. and Mrs. Lloyd Larrison, Uravan, CO: Uranium Oral Histories | 1970-08-05 | Sound |
| 287 | | Mrs. Cleone Bronson Cooper Hansen, Monticello, UT: Uranium Oral Histories | 1970-08-12 | Sound |
| 288 | | N.O.W. (National Organization for Women) presidential candidate Anne L. Lang part 1. Sonia Johnson collection | | Sound |
| 289 | | N.O.W. (National Organization for Women) presidential candidate Anne L. Lang part 2. Sonia Johnson collection | | Sound |
| 290 | | Nathan B. Knight Jr., Moab, UT: Uranium Oral Histories | 1970-08-10 | Sound |
| 291 | | Natoni Garnenez, Ship Rock, NM: Uranium Oral Histories | 1970-08-05 | Sound |
| 292 | | Ned Kazzie, Cane Valley, UT: Uranium Oral Histories | 1970-08-06 | Sound |
| 293 |  | Nevills Expedition Green River trip. Joseph Desloge collection | 1949 | Image/MovingImage |
| 294 |  | Nevills Expedition, 1938. Part 1. Norman D. and Doris Nevills collection | 1938 | Image/MovingImage |
| 295 |  | Nevills Expedition, 1938. Part 2. Norman D. and Doris Nevills collection | 1938 | Image/MovingImage |
| 296 |  | Nevills Expedition, San Juan River, 1946. Norman D. and Doris Nevills collection | 1946 | Image/MovingImage |
| 297 |  | News Conference | 1989-03-23 | Image/MovingImage; Sound |
| 298 |  | News Conference | 1989-04-23 | Image/MovingImage; Sound |
| 299 |  | No Sugar Added. Nate Millard board sports collection | 1998; 2000; 2001; 2002 | Image/MovingImage |
| 300 |  | Nocturne; Sessions; Games. Repertory Dance Theatre collection | 1968; 1969; 1970; 1971; 1972; 1973; 1974; 1975 | Image/MovingImage |
