000 00280nam a2200109Ia 4500
008 230515s9999||||xx |||||||||||||| ||und||
100 _aStern Margaret B.
_958356
245 0 _aStructuural Arithmetic I
260 _bEducators Pub. Service
_c1988
300 _a60
942 _cBK
_pCL
999 _c189047
_d189047