000 00284nam a22001217a 4500
999 _c43798
_d43798
003 OSt
100 _aBogatyreva,I.V. and others.
245 _aIn the world of knowledge: First certification level.
260 _aMoscow
_c2012
300 _a244p.
901 _a1730Don
942 _2ddc
_cBK