Teitl o'r clawr = Title from cover.
RNIB Cymru - tu fewn i'r clawr blaen = inside front cover.
Testun Cymraeg/Saesneg = Welsh/English text.
Arg. cyntaf yn y fformat gwreiddiol = First ed. in original format: 1958.
Y geiriadur mawr : the complete Welsh-English, English-Welsh dictionary by H. Meurig Evans. Published by Gomer in 2008. Publication and catalogue information, links to buy online and reader comments.