sponsored by the National Aeronautics and Space Administration and the International Union of Geological Sciences and held at Sunspace Ranch, Oracle, Arizona, January 14-16, 1985 ; Robert S. Hayden, editor
sponsored by the National Aeronautics and Space Administration and the International Union of Geological Sciences and held at Sunspace Ranch, Oracle, Arizona, January 14-16, 1985 ; Robert S. Hayden, editor