000 00329nam a2200145Ia 4500
008 140317s9999 xx 000 0 und d
082 _a519.5
100 _aUNESCO
245 _aBasic facts and figures.
260 _aRome
_bUNESCO
_c1961
300 _a196
650 _aMathematics.
653 _aMathematics.
942 _2ddc
_cBK
999 _c2085
_d2085