Volume 25 (1990)

Editorial

Contributions

• O. E. Polansky, D. Bonchev: Theory of the Wiener Numbers of Graphs. II. Transfer Graphs and Some of Their Metric Properties, pp. 3-39
• A. T. Balaban, D. Ciubotariu, O. Ivanciuc: Design of Topological Indices. Part 2. Distance Measure Connectivity Indices, pp. 41-70
• R. Chen, S. J. Cyvin, B. N. Cyvin: Recognition of Essentially Disconnected Benzenoids, pp. 71-81
• J. Cioslowski: A Final Solution of the Problem Concerning the (N, M, K)-Dependence of the Total pi-Electron Energy of Conjugated Systems?, pp. 83-93
• S. J. Cyvin, R. Chen: On the Number of Kekule Structures for Rectangle-Shaped Benzenoids - Part XII, pp. 95-103
• S. J. Cyvin, B. N. Cyvin, J. Brunvoll: All-Benzenoid Systems: Additional Classes of Pericondensed Conjugated Hydrocarbons, pp. 105-113
• E. J. Farrell, J. M. Guo: On Circuit Characterizations of Nearly Regular Graphs, pp. 115-130
• I. Gutman: A Property of the Simple Topological Index, pp. 131-140
• I. Gutman, S. Markovic: Topological Properties of Benzenoid Systems. XLVIIIa. An Empirical Study of Two Contradictory Formulas for Total pi-Electron Energy, pp. 141-149
• X. Li, F. Zhang: A Fast Algorithm to Determine Fixed Bonds in Hexagonal Systems, pp. 151-163
• T. Morikawa: Enumeration of Rational Formulas (Representatives for Valence Isomeric Classes) for Molecular Compounds, pp. 165-176
• K. Schubert: On the Bindings in AF_{M} Phases, pp. 177-193
• L. Tuerker: An Approach to the Construction of Certain Isospectral and Subspectral Graphs, pp. 195-215
• L. Tuerker: Bounds for the Largest Eigenvalue in Alternant Hydrocarbons. A Topological Approach, pp. 217-224
• W. He, W. He: Some Topological Properties of Normal Benzenoids and Coronoids, pp. 225-236
• W. He, W. He: Some Topological Properties and Generation of Normal Benzenoids, pp. 237-249
• F. Zhang, X. Li: Hexagonal Systems without Fixed Double Bounds, pp. 251-259

Book Reviews

• M. J. Clarke, J. B. Goodenough et al., Solid State Chemistry (Review by K. D. Becker), pp. 263-264
• W. A. Warr, Chemical Structures - The International Language of Chemistry (Review by W. E. Klotzbuecher), pp. 265-265
• J. Gasteiger, Software-Entwicklungen in der Chemie 2 (Review by C. Krueger), pp. 267-267
• F. Schwabl, Quantenmechanik (Review by W. Pesch), pp. 269-269
• H. Labhart, Einfuehrung in die Physikalische Chemie (Review by G. Platz), pp. 271-272

Erratum, pp. 275-275