Snowdonia
Great Britain.Countryside Commission.
Edwards, G. Rhys.
Vale, Edmund.
Snowdonia Park Joint Advisory Committee.
London H.M.S.O.
1973 [i.e. 1974]
'... prepared by the Countryside Commission in collaboration with the Snowdonia Park Joint Advisory Committee under the editorship of G. Rhys Edwards' - title page verso
Previous ed.: / by Edmund Vale. 1958
Bibliography: p.101-102. - Includes index