000 00299pam a2200121a 44500
082 _a510
_bR182u
100 _aRappaport, David
245 1 _aUNDERSTANDING AND TEACHING
_cELEMENTARY SCHOOL MATHEMATICS
260 _aN. Y.
_bJohn Wiley
_c1966
300 _a227
964 _gCIRC
997 _a36876 C
999 _c426497
_d426497