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020 _a9231017578
082 _a507
082 _bRea
245 _aNew Trends In Integrated Science Teaching
260 _aParis
260 _bUnesco
260 _c1979
300 _a238
300 _bpb
300 _c8x11
350 _a0
365 _b0
365 _dRuppes
440 _v5
700 _aReay, Judith (ED)
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