Columbia subject headings:
Income tax--Law and legislation--European Union countries--Congresses.
Income tax--Law and legislation--Germany--Congresses.
Income tax--Law and legislation--Italy--Congresses.
Income tax--Law and legislation--Spain--Congresses.
Harvard subject headings:
Income tax--Law and legislation--Germany--Congresses.
Income tax--Law and legislation--Italy--Congresses.
Income tax--Law and legislation--Spain--Congresses.
Law--European Union countries--International unification--Congresses.
Tax incidence--Germany--Congresses.
Tax incidence--Italy--Congresses.
Tax incidence--Spain--Congresses.
Princeton subject headings: