K.L. Bell and A.E. Kingston, Photoionisation of Atomic Oxygen and Atomic Nitrogen. B.H. Bransden and C.J. Noble, Positronium Formation by Positron Impact on Atoms at Intermediate Energies. P.G. Burke, ElectronAtom Scattering Theory and Calculations. A. Dalgarno, Terrestrial and Extraterrestrial H3+. K. Dolder, Indirect Ionization of Positive Atomic Ions. G.W.F. Drake, Quantum Defect Theory and Analysis of High Precision Helium Term Energies.M.R. Flannery, Electron-Ion and Ion-Ion Recombination Processes. H.B. Gilbody, Studies of State-Selective Electron Capture in Atomic Hydrogen by Translational Energy Spectroscopy. I.P. Grant, Relativistic Electronic Structure of Atoms and Molecules. D.A. Howe, J.M.C. Rawlings, and D.A. Williams, The Chemistry of Stellar Environments. J.W. Humberston, Positron and Positronium Scattering at Low Energies. H. Kleinpoppen and H. Hamdy, How Perfect Are Complete Atomic Collision Experiments? R. McCarroll and D.S.F. Crothers, Adiabatic Expansions and Non-Adiabatic Effects. B.L. Moiseiwitsch, Electron Capture to the Continuum. M.J. Seaton, How Opaque is a Star? D. Smith and P. Spanel, Studies of ElectronAttachment at Thermal Energies Using the FALP Technique. S. Swain, Exact and Approximate Rate Equations in Atom-Field Interactions. H. Walther, Atoms in Cavities and Traps. J.F. Williams and J.B. Wang, Recent Advances in Electron ImpactExcitation of n=3 States of Atomic Hydrogen and Helium. Subject Index. Contents of Volumes in this Serial.