The rise of the double diplomatic corps in Rome :
The rise of the double diplomatic corps in Rome : a estudy in international practice (1870-1875) / Robert A. Graham - The Hague : Martinus Nijnoff, 1952 - xii, 110 p. ; 25 cm
IGLESIA CATÓLICA--RELACIONES EXTERIORES
ITALIA--RELACIONES EXTERIORES--1870-1914
262.132