Battling a climate of waning support for space flight in general and the human exploration of Mars in particular, natural and social scientists, engineers, and other advocates gathered to provide a vehicle for maintaining a continuous dialogue among people in the technical community who were exploring the issue. In 33 papers they discuss planning, surface exploration, transportation concepts, power and fuel systems on Mars, terraforming, and Mars Base concepts for long-term habitation. Abstracts are included for about 90 additional papers. There is no subject index. Annotation copyrighted by Book News, Inc., Portland, OR