Gwyddoniadur mawr y plant
By: golygydd cyffredinol, Leonard Sealey.
Contributors: Sealey, Leonard.
Publisher: Gwasg Prifysgol Cymru
Published: 1991
Place of publication: Caerdydd [i.e. Cardiff]
Language: wel
Number of pages: 1007
Subjects: Children's encyclopedias and dictionaries, Welsh.
Notes: Includes index.