A study of Hi in So galaxies / Willem van DrielMass in and around galaxies as inferred from observations of neutral hydrogen / door Gerrit van der BurgAn HI study of HII regions and dark clouds / Paul Peter van der WerfInterstellar neutral hydrogen at high velocities / Bastiaan Pieter WakkerThermal and chemical processes in the evolution of interstellar dust and gas / Raimond Joseph Laurens Henricus BreukersOn gaseous discs around stars / Martinus Hubertus Maria HeemskerkThe Leiden/Dwingeloo survey of galactic neutral hydrogen / Lambertus HartmannModels of inhomogeneous interstellar clouds / Maarten Cornelis SpaansGas in distant radio galaxies : probing the early universe / Robert van OjikDense molecular gas around massive young stars / Frank Paul HelmichBe-star discs and non-radial pulsations in rotating stars / John Henry TeltingThe thickness of the HI gas layer in spiral galaxies / Floris Jan SickingThe thickness of the HI gas layer in spiral galaxies / door Floris Jan SickingStar formation and the interstellar medium in galaxy simulations / Jeroen Peter Erik GerritsenXUV-laser spectroscopy of H2 and the mystery of the diffuse interstellar bands / Paul Christiaan HinnenStar formation and the interstellar medium in galaxy simulations / Jeroen Peter Erik GerritsenBe-star discs and non-radial pulsations in rotating stars / John Henry TeltingModels of molecular clouds / Wilfriedus Hendrikus Wilhelmus Maria BolandInterstellar gas dynamics : proceedings of the Sixth Symposium on Cosmical Gas Dynamics, organized jointly by the International Astronomical Union and the International Union of Theoretical and Applied Mechanics, Yalta, The Crimea, U.S.S.R., 8-18 September 1969 / Edited by H. J. HabingNeutral hydrogen in the solar neighbourhood / Paul Ronald WesseliusLaboratory study of the UV induced population transfer in interstellar OH / Gerardus Wilhelmus Maria van MierloModels of molecular clouds / Wilfriedus Hendrikus Wilhelmus Maria BolandNeutral hydrogen observations of binary galaxies / Gustaaf Adolf van MoorselDe neutrale waterstof in Orion / door Hugo van WoerdenPhysics of thermal gaseous nebulae : (physical processes in gaseous nebulae) / by Lawrence H. AllerPhotodissociation and excitation of interstellar molecules : calculations and astrophysical applications / Ewine Fleur van DishoeckRole of grains in interstellar molecule formation : integration of laboratory and theoretical studies / Louis B. Le Sergeant d'HendecourtHI properties of spiral galaxies in the Virgo cluster / door Rein Herm Warmels