Schopf, William J. <br/><br/>
The proterozoic Biosphere: a multidisciplinary study 

 - Cambridge:  University of Dar es Salaam,  1992. 
 - xxiv,1348p.   ;ill.  29cm. 
<br/><br/><label>ISBN: </label>0521366151 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Paleontology<br/>Proterozoic
<br/><br/><label>LC Class. No.: </label>QE724.5.P76