LEADER 00000nam 2200193 a 4500 001 1015417 003 UkHlHU 007 t 008 002007 4 1994 000 eng 020 0750703342 040 UkHlHU 050 4 QA 11 S5 100 1 Sierpinska, Anna. 245 10 Understanding in mathematics. 260 London :|bFalmer,|c1994. 300 189 p. 440 0 Studies in mathematics education series; 2 946 6XX absent
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