5
Argitaratua 1978
Full text available from Earth, Atmospheric & Aquatic Science Database: 01/01/2002 to present
Baliabide elektronikoa Aldizkako argitalpena
8
10
Argitaratua 2007
Full text available from Science Database: 01/01/2007 to present
Baliabide elektronikoa Aldizkako argitalpena
14
Argitaratua 1991
Full text available from Research Library: 01/01/2006 to present
Baliabide elektronikoa Aldizkako argitalpena
16
Full text available from Social Science Database: 01/01/2005 to present
Baliabide elektronikoa Aldizkako argitalpena