000 00301nam a2200121 a 4500
001 4140
005 20140414131945.0
008 090218s19uu xx 00 eng d
050 _aTR 372.7
_bL56 2006
245 _aLet's measure things. Lev. 9.
440 _aLearning math with Albert
999 _c112671
_d112671