00538nam 2200169 450 2123438http://id.bnportugal.gov.pt/bib/porbase/21234380-19282080-XESEC_BC_127.iso/17-03-2009/2074520020418d1987 k y0porb0103 baengENOur commun futureWorld Commission on Environment and DevelopmentOxfordOxford University Press1987399 p.502/504BNporWorld Commission on Environment and DevelopmentPTESECRPC