Heini Gruffudd

title	ISBN-13	year of publication
Beginners Welsh	978-0-7818-0589-6	1998
Beginner's Welsh: With 2 Audio Cds	978-0-7818-1160-6	2009
Cornish is Fun: An Informal Course in Living Cornish	978-0-86243-659-9	2003
Cymraeg Da: Gramadeg Cyfoes ac Ymarferion : Gramadeg Cyfoes Ac Ymarferion / Welsh Grammar for Learners	978-0-86243-503-5	2009
Enwau Cymraeg I Blant / Welsh Names for Children	978-0-904864-99-1	1980
Hands-free Welsh - Welsh Language Audo Course	978-1-84771-129-8	2009
Live Welsh - Learn Real, Spoken Welsh	978-1-84771-242-4	2012
Street Welsh - Phrasebook: The Welsh Phrasebook	978-0-86243-902-6	2006
The Welsh Learner's Dictionary / Geiriadur Y Dysgwyr	978-0-86243-363-5	1998
Welcome to Welsh : A Complete Welsh Course for Beginners	978-1-84771-034-5	2008
Welcome to Welsh: A Complete Welsh Course for Beginners	978-0-86243-069-6	2006
Welsh-English / English-Welsh Dictionary & Phrasebook	978-0-7818-1070-8	2005
Welsh Learners Dictoinary	978-0-86243-517-2	2000
Welsh Personal Names	978-0-317-06852-8	1980
Welsh Rules - Exercises	978-0-86243-711-4	2003
Welsh Rules: Welsh Grammar for Learners	978-0-86243-656-8	2003
Welsh Talk	978-0-86243-447-2	2011