http://AATesaurus.cultura.gencat.cat/aat/getty_enhttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31348460openings http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31348460 openings and opening components BT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31348460 holes RT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31348460 openings by location or context NT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31348460 openings by form NT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31348460 openings by function NT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31348460 opening UF