1
Argitaratua 1980
“...Public Service Research Foundation (Vienna, Va.)...”Full text available from ABI/INFORM Global: 01/01/2000 to 2001
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Aldizkaria
2
Argitaratua 2002
“...Public Service Research Foundation (Vienna, Va.)...”Full text available from ABI/INFORM Global: 10/01/1987 to 12/31/1998
Full text available from ABI/INFORM Global: 2002 to 02/29/2004
Baliabide elektronikoa
Aldizkaria