TY  - BOOK
AU  - De beer G
TI  - Vertebrate zoology
T2  - Textbooks of animal biology. Biological Handbook series
U1  - K9, H7;J1 
PY  - 1951///
CY  - London
PB  - Sidgwick and Jackson Limited      
KW  -  Vertebrata
KW  - Zoology
ER  -