TY  - BOOK
T1  - Pupils' Arithmetical Ability : Differences Due to the Teacher. A methodological Approach
T2  - Annales Academiae Scientiarum Fennicae. Ser. B. ;
A1  - Vahervuo, Toivo
PP  - Helsinki
PB  - Suomalainen Tiedeakatemia
YR  - 1957
UL  - http://vufind10-pruebas.sigbunlp.bibliotecas.unlp.edu.ar/Record/dun.173935
OP  - 48
ER  -