![](/img/cover-not-exists.png)
Letter to the editor
Lucy Cox, George A. Calder, Winston E. Dodge, Akiva Skidell and Saint-Marie-DeniseVolume:
13
Language:
english
Journal:
The Arithmetic Teacher
DOI:
10.2307/41185417
Date:
October, 1966
File:
PDF, 492 KB
english, 1966