[en] [Gutenberg 10843] • The Mental Life of Monkeys and Apes: A Study of Ideational Behavior Franklin Classics
[en] [Gutenberg 43272] • American Weasels Createspace
[en] [Gutenberg 10843] • The Mental Life of Monkeys and Apes: A Study of Ideational Behavior Franklin Classics
[en] [Gutenberg 43272] • American Weasels Createspace