Landing E D  Ed <br/><br/>
Trace Fossils Small Shelly fossils & the Precambrian-Cambrian Boundary Boundary : Proceedings Bulletin No 463  1987 

 -  University of State of N'York, N'York 
 - pp 81;   28*21 
<br/><br/><label>Dewey Class. No.: </label>H6p73,N87/N88/B17711