The evolution of galaxies and their environment : proceedings of the Third Teton Summer School on Astrophysics, sponsored by the Universities of Colorado and Wyoming, Grand Teton National Park, Wyoming USA, July 5-10, 1992 / - Hollenbach, David J.; Thronson, Harley A.; Shull, J. Michael. (National Aeronautics and Space Administration, Ames Research Center, 1993)