CYVIN, S.J. Gutman, I. Kekule structures in benzenoid hydrocarbons /[by] S.J.Cyvin, I.Gutman - Berlin Springer-Verlag 1988 - xv, 348 p.- - lecture notes in chemistry; no.46 . Includes bibliography and index. ISBN: 35401880110 Dewey Class. No.: 547.6 / CYV