000 00513nam a2200157 a 4500
005 20140412111235.0
008 001110s19uu xx 00 eng d
020 _a0-88336-812-9
050 _aTR(GS 510.7
_bBRE L1
245 _aBreakthrough to math :
_bsubtracting whole numbers, level 1, book 3 worksheet /
_cedited by Ann K. U. Tusing.
260 _aSyracuse, NY :
_bReaders Press,
_c1978.
300 _a62 p. ; ill.
650 _aMathematics - - study and teaching
650 _aSubtraction
999 _c102408
_d102408