TY  - BOOK
ED  - International conference on Public Education
TI  - Teaching of natural science in secundary schools
AV  - L10 I69 no.139
PY  - 1952///
CY  - Geneva
PB  - International Bureau of Education
KW  - Ciencias naturales
KW  - Estudio y enseñanza (Secundaria)
KW  - Educación
ER  -