000 00643nam a2200181 a 4500
005 20210219160306.0
008 081007s1980 mx r 000 0 spa d
035 _aUPN01000162584
049 _aUNE
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260 _aGeneva :
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300 _a215 p.
690 _aGuias pedagogicas- EnseƱanza media superior- Examen
690 _aEnseƱanza media superior- Guias pedagogicas
710 2 _aOBI. Oficina de Bachillerato Internacional.
905 _aUNESCO
999 _c134697
_d134697