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639 - Hunting. Fishing. Fish breeding (1)
663/664 - Food and nutrition. Enology. Oils. Fat (1)
7 - the arts. Recreation. Entertainment. Sport (1)
77 - Photography and similar processes (1)
9 - geography. Biography. History (1)
Abandonament de l'agricultura (1)
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Abelló, Montserrat -- Crítica i interpretació (1)
Abengoa -- Estudi de casos (1)
Acadèmies, societats culturals, etc. (1)