L. De Villeneuve
L. de Villeneuve
Les Grottes de Grimaldi, volume I fascicule I, 1906
M. Boulle
The Grimaldi Caves, Volume I, Part II, 1906
The Grimaldi Caves, Volume I, Part III, 1910
R. Verneau
The Grimaldi Caves, Volume II, Part I, 1906
E. Carthaillac
The Grimaldi Caves, Volume II, Part II, 1912