00622nam a2200205 a 450000500170000000800410001702000150005804100080007310000140008124500470009526400510014230000270019349000400022050000120026065000460027265000200031865000460033870000170038470000150040120260717091058.0260717s1198    ii            000 0 eng d  a0050032038  aeng1 aTivy, Joy10aHuman impact on the ecosystem /cTivy, Joy 1aNew York :bOliver And Boyd Publisher,c11982.  a243 p. : ill. ; 24 cm.0 aConceptual frameworks in geography.  aIndice. 4aNaturaleza -- Efectos del hombre sobre la 4aEcologia humana 4aHombre -- Influencia sobre la naturaleza.1 aO'Hare, Greg1 aRooke, Ann