000 00449nam a2200157 a 4500
005 20210219161950.0
008 081007s1990 mx r 000 0 spa d
035 _aUPN01000195140
049 _aUNE
080 _aDO 341.16: 001 (083.9) =20 1989 TER
111 _aUNESCO. Conferencia General
_n(25a. :
_d1989 :
_cParis)
245 0 0 _aThird medium-term plan (1990-1995)
260 _aParĂ­s :
_bUNESCO,
_c1990.
300 _a217 p.
905 _aUNESCO
999 _c167241
_d167241