000			00431nam a2200157 a 4500
005			20210219161906.0
008			131106s1982 mx r 000 0 spa d
020			_a9267100580
035			_aUPN01000193926
049			_aUNE
080		4	_aOC 389.6: 002 (100) =20 "1982" INF
245		0	_aInformation Transfer ; Transfert de l´information
250			_a2a.
260			_aSwitzerland : _bUNESCO, _c1982.
300			_a522 p. ; _bil.
999			_c166027 _d166027