Front Cover; Advances in Quantum Chemistry, Volume 1; Copyright Page; List of Contributors; Preface; Contents; Chapter 1. The Schrödinger Two-Electron Atomic Problem; Chapter 2. Energy Band Calculations by the Augmented Plane Wave Method; Chapter 3. Spin-Free Quantum Chemistry; Chapter 4. On the Basis of the Main Methods of Calculating Molecular Electronic Wave Functions; Chapter 5. Theory of Solvent Effects on Molecular Electronic Spectra; Chapter 6. The Pi-Electron Approximation; Chapter 7. Recent Developments in the Generalized Hückel Method. Chapter 8. Accuracy of Calculated Atomic and Molecular PropertiesChapter 9. Recent Developments in Perturbation Theory; Author Index; Subject Index.