Light Elements in the Early Universe.- Early Nucleosynthesis: The Present Status.- Big Bang Nucleosynthesis: Consistency or Crisis?.- Light Nuclei in the Quasi-Steady State Cosmological Model.- Primordial Heavy Element Production.- Scalar-Tensor Gravity Theories and Baryonic Density.- On the Destruction of Primordial Deuterium.- Primordial Deuterium, Dark Matter and Chemical Evolution of the Galaxy.- Primordial Abundances of Light Elements in Quasi-Homogeneous Models.- Primordial Nucleosynthesis and Light Element Abundances.- Light Elements at High Redshift.- Helium at High Redshift.- Lithium at High Redshifts.- On the Detectability of Primordial Deuterium in QSO Absorption Systems.- Studies of the Cloud Structure, Ionization Structure, and Elemental Abundances in High Redshift QSO BAL Region Gas.- Metal Abundances in High z Absorption Lines Systems.- Galactic Evolution.- Light Element Production in the Galactic Disc by Delayed Low Energy Cosmic Ray Flux from Intermediate Mass Stars.- Mixing of Heavy Elements into the Interstellar Medium of Gas-rich Galaxies: Consequence for the Primordial Helium Determination.- Galactic Evolution of Light Elements: Theoretical Analysis.- Evolution of Light Elements in Galaxies and Intergalactic Medium.- The dY/dZ in the Chemical Evolution of Galaxies with the Multiphase Model.- Chemical Evolution Models with a New Stellar Nucleosynthesis.- Chemical Enrichment of Mergers by Violent Star Formation.- Ultra-Metal-Poor Stars for the 21st Century.- Helium.- Helium in HII Regions and Stars.- The Helium to Heavy Elements Enrichment Ratio.- Primordial Helium from Extremely Metal-Poor Galaxies.- ? Y / ? Z from Fundamental Stellar Parameters.- On the ?Y / ?Z Determination.- ?Y/?Z - No Real Controversy Between Theory and Observations.- TheHelium Abundance of the Galactic Bulge.- Deuterium and 3 He.- The Quest for the Cosmic Abundance of 3He.- Hubble Observations of D/H in the Local ISM and Consequences for Cosmology.- Galactic Evolution of D and 3He.- Chemical Evolution Models of D and 3He: Problems ?.- The Interstellar D/H Ratio Toward G191-B2B.- Lithium.- Observational Status of Lithium in Stars.- The Abundances of Li in ? Scuti Stars: Can They Explain the Li Dip?.- Exploring the Lithium Dip: A Comparison of Clusters.- Convection, Opacities and Pre-Main Sequence Lithium Depletion.- The Behaviour of the Lithium Abundance Along the Pre-Main Sequence Phase.- Lithium Abundances Below the Substellar Limit.- Lithium in Nearby Main-Sequence Solar-Type Stars.- Lithium in Pleiades K Dwarfs.- Lithium Abundances of the Most Metal Poor Stars.- Lithium Abundance in Pop II Stars: Influence of a Small Mass Loss.- Lithium in Late-Type Subgiants.- Rotation and Lithium in Bright Giant Stars.- 7Li Production in Luminous AGB Stars.- Lithium Production and Hot Bottom Burning in AGB Stars.- Resolution of the Classical Hyades Lithium Problem.- Lithium in Old Binary Stars.- Lithium in Tidally Locked Binaries.- Lithium in Companions to Compact Objects.- Stellar Production of Lithium.- Li I Lines in POP II Dwarf Spectra: NLTE Effects.- Lithium Content Investigation at the 6-m Telescope.- Lithium Isotopes.- The Lithium Isotope Ratio in Old Stars.- Constraints on the Galactic Evolution of the Li Abundance from the 7Li/6Li Ratio.- The Interstellar 7Li/6Li Ratio.- Beryllium and Boron.- The Galactic Evolution of Beryllium.- Non-LTE Effects on Be and B Abundance Determinations in Cool Stars.- LiBeB Production by Low Energy Galactic Cosmic Rays.- Genesis and Evolution of LiBeB Isotopes I: Production Rates.- Using Beryllium toExplore Stellar Structure and Evolution.- Implications of the B/Be and 11B/10B Ratios.- Beryllium Abundances in a New Set of Halo Stars.- Beryllium in Metal-Poor Stars.- Boron in the Hyades Giants.