Archwilio'r gofod
By: y fersiwn Saesneg gan Roy Worvill ; testun Cymraeg [gan] Pwyllgor Addysg Sir Ddinbych ; darluniau gan B. Knight a B. H. Robinson.
Series: Llyfrau darllen Ladybird
Publisher: Wills & Hepworth
Published: 1971
Place of publication: Loughborough
Language: wel
Number of pages: 50
Work titles: Exploring space.
Notes: Translated from the English.