TY  - BOOK
AU  -  Werner Heinz
TI  - Comparative psychology of mental development
U1  - 156 
PY  - 1961///
CY  - New York
PB  - Science edition
KW  - Animal
KW  - Ethology
KW  - Psychology, Comparative
N2  -  Psychology, Comparative , Ethology, Animal
ER  -