000 00338nam a2200145Ia 4500
020 _a9780435169749
082 _b03300185
_a510
100 _a"GECKO"
245 0 _aADDITION AND SUBTRUCTION TO 20
260 _b,JORDEN HILLS
_aUK
_c1999
300 _a31
944 _cTB
999 _c559647
_d559647