Boston University,-- Howard Gotlieb Archival Research Center
Manuscripts, printed material, scrapbooks, artwork, correspondence, photographs, journal, legal material, and other papers, relating to Isabel and Larz Anderson -- Includes material concerning Larz Anderson's career as a diplomat in Belgium and Japan
Library of Congress - Research and Reference Services
Correspondence, legal documents, state records from Massachusetts and New Hampshire, memoranda, briefs, tax records, and printed matter, relating to a board of arbitration hearing (1949) to decide the legal residence (Massachusetts or New Hampshire) of Isabel Anderson for tax purposes. Includes complete stenographic record of the hearing