The Arkansas Improvement Company was formed to build the Mississippi, Hamburg and Western Railway in southern Arkansas.

A US Navy Japanese/Oriental Language School graduate, Professor Arnold Schrier’s collection home addresses of students and instructors of the Oriental Language School between 1945-1946. His collection also includes three issues of “The Flat Irony,” “The School of Song” both published in Japan, a program guide to the Spring graduation of US Navy Japanese/Oriental Language School students in 1946 and “Guide to Japan” printed in 1945.

2 articles about CU President Arnold Weber and what he has done for the University

Arthur Day started this project as a biography of Orville Larson. The tapes then went to the Montana Historical Society for transcription (not all of them), only after to be sent to the Archives at Boulder. Arthur Day died on November 15, 1995 in Tucson, Arizona. This collection includes audio tapes and background information for a study in the Western Federation of Miners for the purposes of conduction Oral Histories of some prominent members in the 1980’s.

Interview of Arthur E. Martell on recycling of radioactivity in ground and surface water, recorded on March 26, 1970 at the University of Colorado, Boulder.

A letter from 1945, one photograph, personal items.

The Arthur Waskow papers contains material related to Waskow's writings and rabbinical career, including his collaboration with the Shalom Center and the Shefa Fund.

Manuscripts and personal papers of Arthur Olaf Andersen (1880-1958), music educator, theorist, and composer, professor at the American Conservatory of Music (1908-1929), Chicago Musical College (1929-1934) and University of Arizona, including manuscript musical compositions, essays, articles, fictional writings, correspondence, photographs, family memorabilia, and compositions by Andersen's wife, Helen Somerville Andersen (1892-1968).

Describes the lives of the people who lived on the high plains. The video was produced, written, and photographed by Randall Teeuwen and Andrew Gulliford, copyright 1976 by Randall Teeuwen and Andrew Gulliford, sponsored by Penrose Library, Colorado Springs, Colorado, funded by a grant from the Colorado Centennial/Bicentennial Commission.

Reports and files related to the history of the Astrophysics Department at the University of Colorado.

The Atlas Mine was situated in the Mount Sneffles Mining District, just southwest of Ouray, Colorado, during between 1876 and 1926. Ouray, which was originally Uncompahgre City, was settled around 1875. The Atlas Mine was silver and gold producer. The collection contains various papers including the company’s correspondence, reports, bills, vouchers and ledgers relating the period 1903 to 1924; as well as a variety of books and pamphlets related to mining in the West.

Augusta Ernestine Hauck Block (1872-1967) was born in the Boulder Valley to Robert August Hauck and Ernestine Lange, and was married to Joseph H. Block, Jr. in 1895. Robert Hauck came with the Wisconsin Gold Mining Co. in 1859. The Block family also came in 1859 by wagon train to the Boulder Valley. Augusta was proud of her 59er background and wrote histories of her family and other pioneers and collected notes, photos and clippings concerning Colorado pioneer families.

Collection is a "Prospectus for the Axial Basin Development Company of Axial, Colorado". Photographs and maps included for the coal mine company prospectus.

Aylesa Forsee was a Colorado author of children's literature.

Babi Yar Park is located in Denver, Colorado. It is a 27-acre meemorial park designed by Lawrence Halpring and Satoru Nishita to commemorate the 1941-1943 massacre of Ukrainian Jews and others in Kiev by the Nazis.

The Baine Kerr Papers contain materials related to his published and unpublished works. This includes correspondence, fan mail, manuscripts, and uncorrected proofs.

The Baldwin Eckel Collection contains the papers of Baldwin Eckel, who graduated from the US Army Japanese Language School, which was located at the University of Michigan from 1942-1946. The collection contains materials related to his WWII service.

The Bank of Victor was founded in 1896 by David H. Moffat. After Moffat's death in 1911, the Bank was consolidated with Albert E. Carlton's banking interests. During the 1920s the Cripple Creek District went in decline and the banking business reflected this decline. The Bank of Victor was absorbed by the First National Bank of Cripple Creek in 1926. The collection consists of ledgers, financial papers and correspondence of the Bank of Victor, and the First National Bank of Cripple Creek.

The Barker Dam collection contains both a photographic scrapbook of the building of the dam from 1907-1911 and negatives of the resurfacing of the dam from 1946-1947. The dam is located in southwest corner of Boulder County, and east of Nederland, CO. The completion of the dam created Barker Reservoir.

Mort Stern interview of Barnett Nover, Washington Bureau Chief for the Denver Post. Discussion included Republican politics, the 1948 Republican Convention and the establishment of a Washington bureau for the Post. Also included is a typed summary of the interview.

The materials in this collection were collected by the National Snow and Ice Data Center. The NSIDC supports research into the cryosphere, or the earth’s frozen places, by managing and distributing scientific data. The collection includes many of the analog materials archived by the World Data Center and NSIDC on glaciology from a period of 1860 to 2012 and consists of photographs, data sheets, ice charts, maps, reports, and obersvations regarding ice and glaciers from around the world.