1
Full text available from ABI/INFORM Trade & Industry: 09/01/1998 to 12/31/2012
Full text available from Healthcare Administration Database: 09/01/1998 to 12/31/2012
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
2
Έκδοση 1991
Full text available from ABI/INFORM Trade & Industry: 04/01/1998 to 12/31/2010
Full text available from Accounting & Tax Database: 04/01/1998 to 12/31/2010
Ηλεκτρονική πηγή Επιστημονικό περιοδικό