000 00333nam a2200145Ia 4500
020 _a9780721420714
082 _b03300335
_a500
100 _a"LOCK NORMAN D"
245 0 _aTIME TESTS SHORT CUTS INTO FRACTIONS
260 _c2004
300 _a16
944 _cTB
999 _c559711
_d559711