The mathemical ability : experimental and factorial studies /
by Ingvar Werdelin
- Lund : CWK Gleerup ; Copenhagen : Ejnar Munksgard, 1958
- 356 p. ; gráf., tablas
- Studia psychologica et paedagogica : series altera ; .
MATEMATICAS PEDAGOGIA EDUCACION CIENTIFICA PSICOLOGIA DE LA EDUCACION