000
00270nam a2200109Ia 4500
942
_c
BK
654
_a
245
_a
Preparation of general secondary school curricula
260
_a
Geneva
_b
Internaional Bureau of education
_c
1960
082
_a
373
300
_b
Pb
_a
330,66
999
_c
373924
_d
373924
041
_a
eng