AU  - Knecht,W.
TI  - New trends in physics teaching Vol.1 / 
T2  - Teaching of Basic Sciences, 
U1  - 530.07 
PY  - 1968///
CY  - Paris : 
PB  - United Nations Educational, Scientific and Cultural Organization , 
KW  - ---
KW  - Physics Teaching-New Trends
ER  -