Hawliau tramwy cyhoeddus ym Mharc Cenelaethol Eryri : adroddiad ar arolwg LINKS 1992-1996 = Public rights of way in the Snowdonia National Park : report of LINKS survey 1992-1996 /
Huws, Iwan.
Snowdonia National Park.
Penrhyndeudraeth : Parc Cenedlaethol Eryri,
1996.
Right of way
Walking