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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Oceanografía</topic></authority><related type="narrower"><topic>Aguas marinas</topic></related><related type="narrower"><topic>Batiscafos</topic></related><related type="narrower"><topic>Buceo</topic></related><related type="narrower"><topic>Corrientes oceánicas</topic></related><related type="narrower"><topic>Fotografía submarina</topic></related><related type="narrower"><topic>Mareas</topic></related><related type="narrower"><topic>Olas</topic></related><related type="narrower"><topic>Costas</topic></related><related type="narrower"><topic>Recursos marítimos</topic></related><related type="other"><topic>Meteorología marina</topic></related><related type="other"><topic>Geología submarina</topic></related><related type="other"><topic>Acústica submarina</topic></related><related type="other"><topic>Circulación oceánica</topic></related><related type="other"><topic>Recursos marinos</topic></related><related type="other"><topic>Mares y océanos</topic></related><related type="other"><topic>Barcos oceanográficos</topic></related><related type="broader"><topic>Hidrografía</topic></related></mads>