Letter to William Martin, 11 November 1838 : transcript
Participatory research : articles
Participatory research : books, periodicals and bibliographies
Participatory research : conferences, case studies
Participatory research : unpublished articles and conference papers
Personal and professional correspondence : Yale correspondence, professional correspondence in and out [includes correspondence with Bell Telephone Laboratories, John Pierce and the National Science Foundation as well as a draft of "An Experimental Investigation of Timbre" by Tenney]
Popular economics education : articles and bibliography
Popular economics education : newsletters
Popular economics education : organizational flyers and booklets
Popular economics education: educational tools, kits and manuals
Popular education : Paulo Freire articles
Popular education : articles
Popular education : manuals
Popular education : newsletters
Popular education : reports of gatherings
Popular health promotion : courses, articles and newsletters
Sexual and gender diversity : terms, bibliographies, articles