| Autor: |
Oberteuffer, D., Alberty, H. B., Ashbrook, W. P., Berry, C. S., Charters, W. W., Clickenger, Doris, Diercks, L. H., Eckelberry, R. H., Fawcett, H. P., Giles, Mary, Hopkins, J. R., Hullfish, H. Gordon, Jones, William John, Love, L. L., Mendenhall, C. B., Moore, C. W., Palmer, Gladys, Pressey, S. L., Renshaw, Samuel, Robinson, F. P., Seely, H. F., Teller, J. D., Tharp, J. B., Valentine, W. L. |
| Zdroj: |
Educational Research Bulletin, 1940 Sep 01. 19(12), 335-362. |
| Databáze: |
JSTOR Journals |
| Externí odkaz: |
|
