000 00343 a2200145 4500
080 _a511(07)
_bS 761 T
245 1 _aTeaching of arthmetic
_cby H.F. Spitzer
250 _a2nd edn.
260 _bHoughton Mifflin Company
_c1954
650 _aTeaching
650 _aArthmetic
100 1 _aSpitzer, H.F.
_d
300 _a416 p.
901 _a84061
999 _c24623
_d24623