The Brigham D. Madsen papers (1854-2000) contain diaries, correspondence, research files, and manuscripts. In addition, there is primary and secondary source material on the Northwestern Shoshone Indians, most particularly the Shoshone and Bannock, whose tribal lands are now limited to the Fort Hall Indian Reservation in Southeastern Idaho.

The Madsen Furniture Company records (1870-1999) contain correspondence, brochures, pamphlets, news clippings, magazine articles, architectural drawings, financial ledgers, and notes concerning the Madsen Furniture Company. This company was established in Salt Lake City, Utah, in 1870.

The Susan R. Madsen papers (2000-2016) contain articles, journals, presentations, reports, and manuals related to Madsen's research regarding women in leadership positions.

The William F. X. McConnell article (2000) was written for the Stars and Stripes newspaper which details his participation in the assault on the Rhine River at St. Goar Germany in WWII.

The Daniel McCool papers (1888-2008) contain correspondence, research files, published and unpublished articles, news clippings, legal documents, government publications, pamphlets, brochures, and interview transcripts. Daniel McCool has taught at the University of Arizona, Texas A&M University, and the University of Utah. Formerly the Director of the American West Center at the University of Utah, McCool is currently the Director of Environmental Studies.

The Sheridan L. McGarry papers (1864-1950) contains an article, correspondence, notes, and news clippings relating to the study of LDS currency. McGarry researched and wrote a lengthy article on the subject, which was published in The Numismatist.

The Frank O. McIntyre papers (1932-1976) contain personal items, as well as memoranda, articles and newspaper clippings relating to McIntyre's professional career as an educator, administrator, public relations executive and public speaker.

The Llewelyn Riggs McKay papers (1911-1960) contain correspondence, newspaper clippings, reports and articles. Of special note is a bound volume consisting of a typescript of McKay's missionary journal and correspondence, complied and edited by his children, Douglas R. McKay and Bonnie M. Nelson. This collection also includes many original letters between the McKay family throughout McKay's schooling, teaching and army service.

The Blanche Kendall McKey papers (1892-1971) illustrate the personal and professional life of this actress, playwright, and drama teacher.

The Joseph F. Merrill papers (1898-1952) contain articles, speeches, pamphlets, radio talk transcripts, class instruction texts and notes. Joseph F. Merrill (1868-1952) was an engineering professor at the University of Utah and later became an apostle in the Church of Jesus Christ of Latter-day Saints (LDS Church).

The George A. Meyer essay (1960s) consist of a paper by Meyer entitled "A Critique of Mormonism and the Negro." Meyer's paper critiques a 54-page tract by John J. Stewart, a prolific writer on the subject of Latter Day Saint doctrine, entitled "Mormonism and the Negro."

The Hack Miller papers (1937-1996) contain newspaper articles, magazine stories, trip diaries, office files, and correspondence pertaining to the career of this Utah journalist.

The Wick Miller papers (1931-1994) contain correspondence, research files, field notes, word lists, notebooks, articles and reprints, pamphlets, maps, class syllabi, tests and assignments, student papers, and manuscripts. Wick Miller (1932-1994) was an anthropological linguist and pioneer in language acquisition studies.

The James Missey articles (1990) are titled: "Ammon Hennacy, Christian Anarchism and the One-Person Revolution" and "An Anarchist Joins the Catholic Church: Why Ammon Hennacy Became a Catholic." Currently, Missey is a professor of English at the University of Wisconsin-Stevens Point. He knew Ammon Hennacy before his conversion to the Catholic Church in 1952.

The Loren E. Morey papers (1826-1983) contain correspondence, notes, articles, publications, notebooks, pamphlets, brochures, and news clippings related to hot air balloons and rocket systems. Loren E. Morey received a Ph.D in chemistry from Columbia University in 1944. He worked for Hercules Powder Company for twenty-five years beginning in 1950. While at Hercules, he participated in the development of several military rockets including the Nike Ajax, Little John, Terrier, and Talos.

The A. Russell Mortensen papers (1830-1996) consist of the personal and professional papers of Mortensen (b. 1911), a teacher, administrator, and editor. Included are correspondence, reports, manuscripts, articles, and materials resulting from Mortensen's years as editor of American West magazine.