kw.\*:("Pérennité système")
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Management of land, water and vegetation in traditional agro-ecosystems in Central MexicoGONZALEZ JACOME, A.Landscape and urban planning. 1993, Vol 27, Num 2-4, pp 141-150, issn 0169-2046Conference Paper
Spatial conditions for a sustainable agriculture: regional differentiation in the NetherlandsHETSEN, H.Landscape and urban planning. 1993, Vol 27, Num 2-4, pp 131-139, issn 0169-2046Conference Paper
