Chemical evolution of the early Precambrian / 
edited by Cyril Ponnamperuma 
 - New York :  Academic Press,  1977 
 - xi, 221 p :  ill ;  24 cm. 
<br/><br/> Organized by the Laboratory of Chemical Evolution, University of Maryland 
<br/><br/>Includes bibliographies and index 
<br/><br/><label>ISBN: </label>0125613601 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Pre-Cambrian<br/>Paleontology--Pre-Cambrian<br/>Geochemistry