000 00441nam a2200181 4500
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020 _a92-3-101546-x
082 0 0 _a510. .7 une
100 1 _a"unesco, . "
245 1 0 _anew treds in mathematics teaching:
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_c .. unesco
250 _a1 ed.
260 _afrance :
_bun
_c1979.
300 _a", 280p.;
_c26 cm."
504 _a
650 0 _a
_x
999 _c13227
_d13227