http://AATesaurus.cultura.gencat.cat/aat/getty_enhttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31425656whaleback vessels http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31425656 watercraft by superstructure configuration BT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31425656 backs, turtle UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31425656 turtle backs UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31425656 vessels, whaleback UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31425656 whaleback vessel UF