http://AATesaurus.cultura.gencat.cat/aat/getty_enhttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31350844communications structures http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31350844 single built works by function BT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31350844 communication RT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31350844 communications RT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31350844 time balls NT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31350844 sound mirrors NT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31350844 telecommunications towers NT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31350844 telephone booths NT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31350844 communications buildings NT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31350844 communications structure UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31350844 structures, communications UF