'... the invited papers (edited and updated) presented at the Second College Park Colloquium on Chemical Evolution held at the University of Maryland from October 19 to November 1, 1975. These meetings have been organized by the Laboratory of Chemical Evolution ...' - Preface.
Chemical evolution of the early Precambrian. ISBN 0125613601. Published by Academic Press in 1977. Publication and catalogue information, links to buy online and reader comments.