1. As sufficient space for references is not available, readers are instead referred to the reference list in: P. Koch, B. Müller, and J. Rafelski, Strangeness in relativistic nuclear collisions, GSI preprint 86-7 (to appear in Physics Reports).
2. I wish to thank my friends and collaborators P. Koch (Frankfurt) and J. Rafelski (Cape Town), without whose help this report would not have been possible.