Comparative Planetology

Interstellar Communication; Scientific Perspectives

Chemical Evolution of the Early Precambrian

Comets and the Origin of Life: Proceedings of the Fifth College Park Colloquium on Chemical Evolution, University of Maryland, College Park, Maryland, U.S.A., October 29th to 31st, 1980

Chemical Evolution of the Giant Planets

Cosmochemistry and the Origin of Life: Proceedings of the NATO Advanced Study Institute Held at Maratea, Italy, June 1-12, 1981

Chemical Evolution: Structure and Model of the First Cell: Conference on the Structure and Model of the First Cell (Ictp) Held in Trieste, Italy, 29 August-2 September 1994

Origins of Life

Comets and the Origin of Life: Proceedings of the Fifth College Park Colloquium on Chemical Evolution, University of Maryland, College Park, Maryland, U.S.A., October 29th to 31st, 1980