000 00446nam a2200157 a 4500
005 20210219161948.0
008 080618s1972 mx r 000 0 spa d
035 _aUPN01000195096
049 _aUNESCO
080 1 4 _aDO 341.16: 001 (083.9)=20 PLA No. 19
111 2 _aUNESCO. Conferencia General
_n(19a :
_d1977 :
_cParĂ­s)
245 0 _aMedium-term plan (1977-1982)
260 _aParis :
_bUNESCO,
_c1972.
300 _a369 p.
905 _aUNESCO
999 _c167197
_d167197