42
Argitaratua 1983
Full text available from ABI/INFORM Global: 12/01/1987 to 05/31/1992
Baliabide elektronikoa Aldizkaria
43
Full text available from Research Library: 04/01/2007 to present
Baliabide elektronikoa Aldizkaria
46
Argitaratua 1986
Full text available from Health & Medical Collection: 12/31/1992 to 01/31/2000
Baliabide elektronikoa Aldizkaria
47
52
Argitaratua 2003
Full text available from ABI/INFORM Global: 01/01/2003 to 08/31/2005
Baliabide elektronikoa Aldizkaria