TY  - SER
AU  -  Yerkes, Robert Mearns, 
TI  -  The Mental Life of Monkeys and Apes : :  A Study of Ideational Behavior 
AV  - QL 
PY  - 2004///
PB  -  Project Gutenberg, 
KW  -  Primates -- Psychology
KW  -  Mammals -- Psychology
KW  -  Animal intelligence
N1  -  Public domain in the USA;  Text
UR  -  http://www.gutenberg.org/ebooks/10843
ER  -