Egni
Subtitle: pynciau dethol
By: gan J.J. Wellington ; addasiad Cymraeg gan Siân Tomlinson.
Contributors: Tomlinson, Siân.
Series: Estyn gwyddoniaeth -- (7)
Publisher: D. Brown a'i Feibion mewn cydweithrediad â Stanley Thornes
Published: 1991
Place of publication: Y Bontfaen
Language: wel
Number of pages: 67
Subjects: Power resources -- Study and teaching (Secondary); Science -- Study and teaching (Secondary)
Work titles: Energy.
Notes: Arg Saesneg gwreiddiol = Original English ed: Leckhampton: Stanley Thornes, 1985.

Yn cynnwys mynegai = Includes index.

Addasiad Cymraeg o = Welsh adaptation of: Extending science 7: Energy (selected topics).