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035 _aMX001000154615
050 _aLB1028.5
_bA85
245 0 0 _aAspects of educational technology.
264 1 _aLondon :
_bPitman publishing
300 _avolúmenes
650 4 _aEnseñanza programada
_vCongresos
336 _atexto
_2rdacontent
337 _asin medio
_2rdamedia
338 _avolumen
_2rdacarrier
999 _c3168
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