1
Foilsithe 1989
Full text available from Earth, Atmospheric & Aquatic Science Database: 01/01/1998 to present
Leictreonach Sraithchlár
3
Foilsithe 2009
Digitalia Hispánica
Leictreonach ríomhLeabhar
4
Foilsithe 2010
Digitalia Hispánica
ríomhLeabhar