1. Editorial foreword

   • Dennis H. Rouvray

   EditorialNotes Pages: i - ii

2. C.A. Coulson's work on a contour-integral approach to the London theory of magnetic susceptibility of conjugated molecules

   • Brian O'Leary
   • R. B. Mallion

   Special Paper Pages: 323 - 342

3. Factors determining the direction of the stereoselection process in the generalized Frank model

   • I. Gutman

   Papers Pages: 343 - 355

4. Moments and characteristic polynomials of bipartite Hückel graphs

   • Y. Jiang
   • H. Zhang

   Papers Pages: 357 - 375

5. Propagator representation for partial structure character in conjugated systems

   • K. Sakurai
   • K. Nishimoto

   Notes Pages: 377 - 382

6. Proof of the generalized expressions for the number of perfect matchings of polycube graphs

   • Hideyuki Narumi
   • Haruo Hosoya

   Notes Pages: 383 - 391

7. Enumeration of Kekulé structures in benzenoid hydrocarbons: “flounders”

   • R. Tošić
   • S. J. Cyvin

   Notes Pages: 393 - 401

8. Computing the characteristic polynomial of a tree

   • Bojan Mohar

   Notes Pages: 403 - 406

9. Open problems in mathematical chemistry

   • P. G. Mezey

   Legacy Pages: 407 - 407