TY  - BOOK
AU  - Kohler Wolfgang
AU  - Winter Ella
TI  - Mentality of apes
U1  - 599.8815 
PY  - 1957///
CY  - London
PB  - Penguin Books
KW  - Animal intelligence
KW  - Apes
KW  - Chimpanzees
KW  - Psychology
ER  -