Author
United States,
7
United States. Department of State,
7
Italy
6
Italy,
6
United States. Department of State
6
SpringerLink (Online service)
4
Merino-Rodríguez, Manuel,
2
ScienceDirect (Online service)
2
United States. Social Security Administration
2
Carpana, Emanuele,
1
Cocker, Henry
1
De Laurentis, Davide,
1
Di Cosmo, Lucio,
1
Floris, Antonio,
1
Foreign Service Institute (U.S.)
1
Frederick II, Holy Roman Emperor, 1194-1250
1
Gasparini, Patrizia
1
Gullino, M. Lodovica
1
Heilmann, Helga R.
1
Lodesani, Marco,
1
Pizzetti, Ippolito
1
San Marino,
1
Tautz, Jürgen
1
Wood, Casey A. 1856-1942
1
Zappala, Stephen
1