Global bio-events :  a critical approach : proceedings of the first international meeting of the IGCP Project 216 "Global Biological Events in Earth History" / 
edited by Otto H. Walliser 
 - Berlin :  Springer-Verlag,  1986 
 - 442 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>3540171800 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth--History--Congresses