Find out about machines

Sonraí bibleagrafaíochta
Príomhchruthaitheoir:	Andrews, Malcolm
Formáid:	LEABHAR
Teanga:	English
Foilsithe / Cruthaithe:	London Hart-Davis Educational c1979.
Sraith:	Open Science
Ábhair:	Science > Study and teaching (Secondary). Machines > Study and teaching.