http://AATesaurus.cultura.gencat.cat/aat/getty_enhttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31305291migration http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31305291 functions by general context BT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31305291 migrations RT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31305291 internal migration NT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31305291 immigration NT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31305291 emigration NT