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Έκδοση 1983
Full text available from Nursing & Allied Health Database: 05/01/1998 to 05/31/2000
Full text available from Research Library: 05/01/1998 to 05/31/2000
Full text available from Sociology Database: 05/01/1998 to 05/31/2000
Ηλεκτρονική πηγή Επιστημονικό περιοδικό