000 00296nam a2200121 a 4500
001 4140
005 20140414131943.0
008 090218s19uu xx 00 eng d
050 _aTR 372.7
_bW57 2006
245 _aWhich is bigger? Act. 1.
440 _aLearning math with Albert
999 _c112623
_d112623