00651cam a2200157   4500008004100000020001500041035001200056111006800068245016100136250001100297260005600308300002600364504002100390650004600411710003600457070125s1992    mx a          000 0 spa u  a968838111x  aa4586851 aConference on Environment and Development Summary d(1992, Jul)00aNational Report on environment d(1989-1991) :bFor the United Nations Conference on Environment and Development SUMMARY /cSecretary of social Development.  a1a ed.  aMéxico :bSecretary of social Development, c1992  a32 p.:bils.;c21 cm.  aIncluye índice 4aEcología xCongresos, Conferencias etc.2 aSecretary of social Development