TY  - BOOK
AU  - Heller, R.
TI  - New trends in biology teaching
T2  - The teaching of basic sciences
U1  - 574.07 
PY  - 1967///-71
CY  - Paris
PB  - UNESCO
KW  - BiologÃ­a
KW  - Estudio y enseÃ±anza
ER  -