http://AATesaurus.cultura.gencat.cat/aat/getty_enhttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31480391covered hopper cars http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31480391 hopper cars BT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31480391 cars, covered hopper UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31480391 covered hopper car UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31480391 hopper cars, covered UF