Columbia subject headings:
Christianity and literature.
Praise in literature.
Wales--Civilization.
Wales--In literature.
Welsh literature--History and criticism.
Harvard subject headings:
Christianity and literature.
Praise in literature.
Wales--Civilization.
Wales--In literature.
Welsh literature--History and criticism.
Princeton subject headings:
English poetry--Welsh authors--History and criticism.
Praise in literature.
Welsh poetry--History and criticism.