Seiniau
Subtitle: pynciau dethol
By: gan J. J. Wellington ; addasiad Cymraeg gan Sian Owen.
Contributors: Owen, Sian.
Series: Estyn gwyddoniaeth -- (4)
Publisher: D. Brown a'i Feibion mewn cydweithrediad â Stanley Thornes
Published: 1991
Place of publication: Y Bontfaen
Language: wel
Number of pages: 59
Subjects: Sound -- Study and teaching (Secondary); Science -- Study and teaching (Secondary)
Work titles: Sounds.
Notes: Arg Saesneg gwreiddiol = Original English ed: Leckhampton: Stanley Thornes, 1984.

Testun yn parhau tu mewn i'r clawr cefn = Text continues inside back cover.

Yn cynnwys mynegai = Includes index.

Addasiad Cymraeg o = Welsh translation of: Extending science 4: Sounds (selected topics).