Grymoedd yn gweithredu
By: [George Snape] ; [golygyddion cyffredinol: David Rowlands a George Snape] ; [addasiad Cymraeg: Gymen Cyf a Meinir Evans].
Contributors: Rowlands, David, 1950-; Evans, Meinir.; Cymen.; National Language Unit of Wales.; Welsh Joint Education Committee.
Series: Gwyddoniaeth ar waith
Publisher: Uned Iaith Genedlaethol Cymru CBAC
Published: 1998
Place of publication: Caerdydd
Language: wel
Number of pages: 32
Subjects: Science -- Study and teaching (Secondary); Force and energy -- Study and teaching (Secondary)
Work titles: Science at work: Forces in action.
Notes: Arg. Saesneg gwreiddiol = Original English ed.: Harlow: Addison Wesley Longman Limited, 1996.

Addasiad Cymraeg gan = Welsh adaptation by: Cymen Cyf a Meinir Evans.

Teitl clawr = Cover title.

Testun ar y cloriau mewnol = Text on inside covers.

Addasiad Cymraeg o = Welsh adaptation of: Science at work: Forces in action.