Rahn, Carl Leo, 1881-1933
Clever Hans (The Horse of Mr. Von Osten) : A contribution to experimental animal and human psychology [recurso electrónico] / Carl Leo Rahn - Project Gutenberg, 2010 - Project Gutenberg 33936 .
Public domain in the USA.
Text
Animal training Horses Psychology, Comparative Animal intelligence
QL
Clever Hans (The Horse of Mr. Von Osten) : A contribution to experimental animal and human psychology [recurso electrónico] / Carl Leo Rahn - Project Gutenberg, 2010 - Project Gutenberg 33936 .
Public domain in the USA.
Text
Animal training Horses Psychology, Comparative Animal intelligence
QL