Sophia Smith Collection (SSC) - The SSC website includes collection lists and descriptions; online guides for the SSC - as well as for other primary source repositories in the Five Colleges - are available in Five College Archives & Manuscripts Collections database, Asteria.
Five College Library Catalog - Remember to search people (e.g. Margaret Sanger) and organizations (e.g. National Congress of Neighborhood Women) as both author and subject. Searching by author will retrieve additional primary source material; searching by subject will retrieve both secondary literature and possibly additional primary sources.