1. Peach B. N. , and Horne J. , 1934. Sutherland, Scotland 5; ¼ in. to 1 mile, 1: 253,440.
2. Peach B. N. , and Horne J. , 1931. Altnaharra, Scotland 108; 1 inch to 1 mile, 1: 63,360.
3. Peach B. N. , and Horne J. , 1925. Lairg, Scotland 102; 1 inch to 1 mile, 1: 63,360.
4. Le massif d’Allauch;Bertrand;Bull. Serv. Carte Géol. France,1891