Vol. 399: Functional Analysis and its Applications. Proceedings, 1973. Edited by H. G. Garnir, K. R. Unni and J. H. Williamson II, 584 pages. 1974. Vol. 400: A Crash Course on Kleinian Groups. Proceedings1974 Edited by L. Bers and I. Kra. VII, 130 pages. 1974. Vol. 401: M. F. Atiyah, Elliptic Operators and Compact Groups. V, 93 pages. 1974. Vol. 402: M. Waldschmidt, Nombres Transcendants, VIII, 277 pages. 1974. Vol. 403: Combinatorial Mathematics. Proceedings 1972. Edited by D. A. Holton. VIII, 148 pages, 1974. Vol. 404: Theorie du Potentiel et AnalyseHarmonique. Edite par J. Faraut. V, 245 pages. 1974. Vol. 405: K. J. Devlin and H. Johnsbraten, The Souslin Problem. VIII, 132 pages. 1974. Vol. 406: Graphs and Combinatorics. Proceedings 1973. Edited by R. A. Bari and F. Harary. VIII, 355 pages. 1974. Vol. 407: P. Berthelot, Cohomologie Cristalline des Schemas de Caracteristique p > o. II, 604 pages. 1974. Vol. 408: J. Wermer, Potential Theory. VIII, 146 pages. 1974. 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Hamilton, Harmonic Maps of Manifolds with Boundary. III, 168 pages. 1975. Vol. 472: Probability-Winter School. Proceedings 1975. Edited by Z. Ciesielski, K. Urbanik, and W. A. Woyczyhski. VI, 283 pages. 1975. Vol. 473: D. Burghelea, R. Lashof, and M. Rothenberg, Groups of Automorphisms of Manifolds. (with an appendix by E. Pedersen) VII, 156 pages. 1975. Vol. 474: Seminaire Pierre Lelong (Analyse) Ann6e 1973/74. Edit6 par P. Lelong. VI, 182 pages. 1975. Vol. 475: R6partition Modulo 1. Actes du Colloque de Marseille- Luminy, 4 au 7 Juin 1974. Edit6 par G. Rauzy. V, 258 pages. 1975. 1975.. Vol. 476: Modular Functions of One Variable IV. Proceedings 1972. Edited by B. J. Birch and W. Kuyk. V, 151 pages. 1975. Vol. 477: Optimization and Optimal Control. Proceedings 1974. Edited by R. Bulirsch, W. Oettli, and J. Steer. VII, 294 pages. 1975. Vol. 478: G. Schober, Univalent Functions - Selected Topics. V, 200 pages. 1975. Vol. 479: S. D. Fisher and J. W. 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