000
00266nam a22001097a 4500
999
_c
311
_d
311
082
_a
510
_b
Eic
100
_a
Eicholz,Robert E
245
_a
investigating school mathematics
_c
Eicholz,Robert E
260
_b
Addison Wesley publishing company
300
_a
355p.
942
_c
L