1. A constant denominator perturbation theory for molecular energy

   • John M. Cullen
   • Michael C. Zerner

   Original Investigations Pages: 203 - 226

2. Porphyrins 42. Ground and excited state calculations on the isomers of free base porphine and sirohydrochlorin

   • Diane C. Rawlings
   • Ernest R. Davidson
   • Martin Gouterman

   Original Investigations Pages: 227 - 241

3. Quantum model of selective multiphoton processes: The role of external (field) and internal (anharmonic coupling) detunings

   • Jui-teng Lin
   • Thomas F. George

   Original Investigations Pages: 243 - 250

4. Fragment interaction analysis in the framework of ab initio UHF MO computations. I. Conformational preference in the ethyl radical

   • Fernando Bernardi
   • Andrea Bottoni
   • Jaques Fossey

   Original Investigations Pages: 251 - 263

5. Localized orbitals and the Fermi hole

   • William L. Luken
   • David N. Beratan

   Original Investigations Pages: 265 - 281

6. Extended basis NDDO calculations on diatomic molecules

   • John Tyler Gleghorn
   • Frederick William McConkey

   Original Investigations Pages: 283 - 293

7. A cooperative calculation of geometries, energetics and electric properties of water trimers and tetramers

   • Edwin S. Campbell
   • David Belford

   Original Investigations Pages: 295 - 301

8. Nuclear electric dipole shielding in molecular ions

   • Saul T. Epstein

   Short Communications Pages: 303 - 305

9. Announcement

   Announcement Pages: 306 - 306