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020 _a968-23-2212-X
_c19.95
040 _aPUCPR
049 _bev
092 0 _221
_a333.707
_bC7375
245 0 3 _aLa complejidad ambiental
_cEnrique Leff ... [et al.].
260 _aMéxico, D.F.
_bSiglo Veintiuno Editores
_c2000.
300 _aix, 314 p.
_c21 cm.
650 0 _aEnvironmental education
_2Local
_992384
650 0 _aEcology
_xStudy and teaching.
_989958
700 1 0 _aLeff, Enrique.
_2Local
_9124440
999 _c184055
_d184055