Thorndike, Edward L. 1874-1949
The Psychology of Arithmetic [recurso electrónico] / Edward L. Thorndike - Project Gutenberg, 2012 - Project Gutenberg 39300 .
Public domain in the USA.
Text
Arithmetic -- Study and teaching
QA
The Psychology of Arithmetic [recurso electrónico] / Edward L. Thorndike - Project Gutenberg, 2012 - Project Gutenberg 39300 .
Public domain in the USA.
Text
Arithmetic -- Study and teaching
QA