The archive consists of minutes, agendas, constitutions, circulars, working papers, publications, reports, correspondence, newsletters, and source material for publications including press cuttings and printed works from other organisations.

The archive was transferred to The Women's Library by two members of the group, both active in the late 1960s to mid 1970s. As a result, survival of records is not uniform and reflects their interests, rather than being representative of MIA as a whole. Some non-MIA material was also present: this has been catalogued as 5MIA/13.