TY - BOOK ED - Unesco. TI - New trends in chemistry teaching = Tendances nouvelles de l'enseignement de la chimie T2 - Teaching of basic sciences U1 - 540.7 U56n PY - 1967///-©1992 CY - Paris PB - Unesco, KW - Chemistry -- Study and teaching KW - Chemistry -- education. Química KW - Estudio y enseñanza ER -