Records of the General Conference, twenty-first session, Belgrade,1980.
- Paris : UNESCO, c 1982.
- Vols. : ill. ; 30 cm.
V. 3-- ;
338 338
92-3-002010-9
Unesco--Conference paper.
060 / U3r
V. 3-- ;
338 338
92-3-002010-9
Unesco--Conference paper.
060 / U3r