000 00352nam a2200133Ia 4500
020 _a0809483033
082 _b2832
_a000
245 0 _aMathematics and computers.......THE CHILDREN TREASURY OF KNOWLEDGE
260 _bTime Life Books
_aHong Kong
_c2011
300 _a112
944 _cR
999 _c602170
_d602170