Egni
By: (awduron: Janet Ager, Richard Ager, Barbara May) ; (addasiad Cymraeg: Ken Owen).
Contributors: Ager, Richard.; May, Barbara.; Owen, Ken.
Series: Gwyddoniaeth ar waith
Publisher: Qualitex mewn cydweithrediad â Longman
Published: 1992
Place of publication: Caerdydd
Language: wel
Number of pages: 32
Subjects: Force and energy -- Study and teaching (Secondary); Science -- Study and teaching (Secondary)
Work titles: Energy.
Notes: Arg Saesneg gwreiddiol = Original English ed: Addison-Wesley, 1981.

Teitl clawr = Cover title.

Cyfieithiad Cymraeg o = Welsh translation of: Science at work: Energy.