000 00315nam a2200121 a 4500
001 4140
005 20140414131945.0
008 090218s19uu xx 00 eng d
050 _aTR 372.7
_bC23 2006
245 _aCarrrying up and carrying down. Act. Bk. 7.
440 _aLearning math with Albert
541 _eM4050
999 _c112673
_d112673