Mesurau, siâp a gofod : gweithgareddau i ddysgu rhifedd.
Koll, Hilary.
Mills, Steve,1955-
Kervegant, Ffion.
Aberystwyth : Canolfan Astudiaethau Addysg,
c2008.
Arg. Saesneg gwreiddiol = Original English ed.: London : A. & C. Black, 2004.
Cyfieithydd = Translator: Ffion Kervegant.
Mathematics
Measurement
Geometrical constructions
Form perception
Size perception
Space perception