P1073 Testun Cymraeg/Saesneg = Welsh/English text tĂȘte-bĂȘche.
Buy a copy
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Ffliw, pen mawr, neu lid yr ymennydd? : gofala am dy ffrind. Published by Y Swyddfa Gymreig in 2006. Publication and catalogue information, links to buy online and reader comments.