TY  - BOOK
AU  - Stahl,Barbara J
TI  - Vertebrate history : : problems in evolution
SN  - 0070606986
U1  - 596.138 
PY  - 1974///
CY  - New York
PB  - McGraw-Hill
KW  - Vertebrates--Evolution	
KW  - Vertebrates, Fossil	
ER  -