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	mads.xsd"><authority><topic authority="http://www.serbi.ula.ve/tematres/vocab/">ZONAS DE CULTIVO</topic></authority><related type="narrower"><topic>AGRICULTURA EN LAS REGIONES ARIDAS</topic></related><related type="narrower"><topic>CLASIFICACION DE SUELOS</topic></related><related type="narrower"><topic>REGIONES ARIDAS</topic></related><related type="broader"><topic>CLIMATOLOGIA AGRICOLA</topic></related><related type="broader"><topic>GEOGRAFIA AGRICOLA</topic></related></mads>