TY  - BOOK
AU  - Heller,R.
ED  - Unesco.
TI  - New trends in biology teaching = Tendances nouvelles de l'enseignement de la biologie
T2  - The Teaching of basic sciences
PY  - 1966///-
CY  - Paris
PB  - Unesco
KW  - Biology
KW  - Study and teaching
KW  - Collected works
ER  -