The series is divided into two subseries based on their creator: Subseries A: Officer's Correspondence, 1951-1996 and Subseries B: General Correspondence, 1948-1994. Materials were only separated into the union officers' section if their origin was clear; the general correspondence contains a mixture of correspondence that may include some union officers. The union officers' subseries is sorted by officer: president, financial secretary, and other officer's correspondence.