Balaban, Alexandru T. PYRYLIUM salts: syntheses, reactions, and physical properties: advances in heter /[by] Alexandry T.Balaban....[et al.] - New York Academic press 1982 - ix, 434 p. Includes appendix, references and index. ISBN: 0-12-020652-8 Dewey Class. No.: 547.59 / PYR