00490cam a22001337a 4500008004000000082001200040245008200052260005600134300001000190650003400200650003800234650004300272700004100315180718b1979   xxu||||| |||| 00| 0 eng d  aO91 Un3  aReadings in environmental managementcby United Nations Environment Programme  aBangkokbUnited Nations Environment Programmec1979  a416p.  aSocial mobility -- Congresses  aEducation and state -- Congresses  aEducational equalization -- Congresses  aUnited Nations Environment Programme