This file contains a membership card for the Calvin Amateur Association Football Club Soldier Team for the 1918 season, including a list of games in the season, and the names of patrons and officials.

Included is the constitution, by-laws, and minute books covering 1922-1940. Approximately one half of this material consists of membership cards recording the name, rank, degrees, and publications of members from 1920 until ca 1970. There are also membership lists for various periods including the founding members and lecture lists, ca 1930s. The secretary's files, covering the period 1963-1969, contain files on dues collected, expenditures, membership (nominations, transfers, correspondence with members), the national convention, and chapter meetings. Financial transactions from 1939 to 1946 are recorded in the treasurer's account book.