Professional Air Traffic Controllers Organization Billings Local 311 records consist of records created and collected by the local union in the years leading up to and following the 1981 nationwide strike. Includes correspondence, case files, financial records, constitution/contracts, membership records, notes, printed material, reports, and news clippings.

This collection contains letters written by Willard "Bill" J. Huber to his wife, Cecelia, while he worked as a travelling salt saleman in Montana. There are also some letters written by Cecelia to her mother. The dates range from 1928 to 1956 with the majority of letters written between 1939 and 1942.