Gwarchodfa Natur Genedlaethol Tywyn Niwbwrch/Ynys Llanddwyn =
Subtitle: Newborough Warren/Ynys Llanddwyn National Nature Reserve.
Contributors: Countryside Council for Wales.
Publisher: Cyngor Cefn Gwlad Cymru
Published: 1993
Place of publication: Bangor
Language: wel
Subjects: Newborough Warren National Nature Reserve.; Ynys Llanddwyn National Nature Reserve.; Natural areas -- Wales -- Tywyn Niwbwrch.; Natural areas -- Wales -- Ynys Llanddwyn.
Notes: Testun yn Gymraeg a Saesneg = Text in Welsh and English.