American Artists: Signatures and Monograms, 1800-1989. John Castagno. Includes Canadian and Latin American artists. Some references and auction records. Mugar Library N 45 C37 1990.
Classified Directory of Artists’ Signatures, Symbols, and Monograms: American Artists with New U.K. Additions. H. Kaplan. Mugar Library N 45 C36 1987.
Dictionary of Signatures and Monograms of American Artists. Peter Falk. Mugar Library N 45 F35 1988.