The William Costley II Collection is comprised of color slides of Great Northern Railway rolling stock.
The William Lowe Collection is comprised of Great Northern Railway Annual Reports, Rule Books, OAS 1954, and an interchange study.
The William R Allen Collection is comprised of timetables, 1 "Talking It Over", and employment and retirement papers as a car Inspector for the Great Northern Railway, in addition to other items that were unrecorded at the time of accession.
The William Schanus Collection is comprised of 2 Winold Reiss Blackfoot Native American prints, "First Stabber" and "Sundance".
The William Shaman Collection is comprised of audio tapes of "Empire Builder" radio shows.
The William Voss Collection is comprised of maps and drawings of railroad right of way maps, facilities drawings, bridges and buildings. Also included are right of way maps and drawings from Authorization for Expenditure files.