000 00521cam a22001457a 4500
008 180718b1979 xxu||||| |||| 00| 0 eng d
082 _aO91 Un3
245 _aReadings in environmental management
_cby United Nations Environment Programme
260 _aBangkok
_bUnited Nations Environment Programme
_c1979
300 _a416p.
650 _aSocial mobility -- Congresses
650 _aEducation and state -- Congresses
650 _aEducational equalization -- Congresses
700 _aUnited Nations Environment Programme
999 _c411988
_d411988