TY  - BOOK
T1  - Unesco pilot project on new methods and techniques in physics teaching
T2  - WS/0765.72-AVS
A1  - Bergvall, Pär
PP  - París
PB  - UNESCO
YR  - 1965
UL  - http://vufind10-pruebas.sigbunlp.bibliotecas.unlp.edu.ar/Record/dun.21273
OP  - 80
ER  -