00484nam a2200157Ia 450000100070000000500170000700800410002402000250006504000100009024500570010026000520015730000230020965000350023265000330026770000260030025621520210210062653.0010614e2000    mx     gr     000 0 spa d  a968-23-2212-Xc19.95  aPUCPR03aLa complejidad ambientalcEnrique Leff ... [et al.].  aMéxico, D.F.bSiglo Veintiuno Editoresc2000.  aix, 314 p.c21 cm. 0aEnvironmental education2Local 0aEcologyxStudy and teaching.10aLeff, Enrique.2Local