Educational psychology
| Egile nagusia: | |
|---|---|
| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
New York, Cincinnati
American Book Company
[©1941]
|
| Saila: | Half-title: American education series
G. D. Strayer, general editor |
| Gaiak: |