Flagg, C. A. (1907). A guide to Massachusetts local history: Being a bibliographic index to the literature of the towns, cities and counties of the state, including books, pamphlets, articles in periodicals and collected works, books in preparation, historical manuscripts, newspaper clippings, etc. Salem, MA: Salem Press Co..

Flagg, Charles Allcott. A Guide to Massachusetts Local History: Being a Bibliographic Index to the Literature of the Towns, Cities and Counties of the State, Including Books, Pamphlets, Articles in Periodicals and Collected Works, Books in Preparation, Historical Manuscripts, Newspaper Clippings, Etc. Salem, MA: Salem Press Co., 1907.

Flagg, Charles Allcott. A Guide to Massachusetts Local History: Being a Bibliographic Index to the Literature of the Towns, Cities and Counties of the State, Including Books, Pamphlets, Articles in Periodicals and Collected Works, Books in Preparation, Historical Manuscripts, Newspaper Clippings, Etc. Salem, MA: Salem Press Co., 1907.