LEADER 00000nam 2200193 a 4500 001 0949493 007 t 008 002801 2 1991 000 eng 020 0521409446 040 CURLBL 100 1 Holding, John. 245 14 The investigations book :|ba resource book for teachers of mathematics. 260 Cambridge :|bCambridge University Press,|c1991. 300 186p. 946 6XX absent
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