9
Published 1970
Full text available from Latin America & Iberia Database: 04/01/2008 to present
Electronic Journal
11
Published 1995
Available in Education Source.
Electronic Journal
12
Published 1997
Digitalia Hispánica
Electronic eBook
14
Digitalia Hispánica
Electronic eBook
15
Available in Fuente Académica Plus.
Electronic Journal
16
Published 1934
Available in Fuente Académica Plus.
Electronic Journal