Ymchwilio am wybodaeth
By: Merfyn Griffiths
Contributors: Schools Council
Publisher: Hodder and Stoughton
Published: 1975
Place of publication: London
Language: wel
Number of pages: 189
ISBN-13: 9780340180822
Subjects: Science; Study and teaching (Elementary)
Notes: "Project gan y Cyngor Ysgolion yn Gymraeg"--Cover.