'... 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.
Snowdonia. ISBN 0117003492. Published by H.M.S.O. in 1973. Publication and catalogue information, links to buy online and reader comments.