[HELBRONNER Paul] Detailed geometrical description of the French Alps. Tome IX, 1929: Direct geodetic junction of Corsica with the French mainland. Corsican meridian range. Measurement of the meridian arc of the French Alps. Paris, Gauthier-Villars, 1910-1939. 1 vol. in-4, full publisher's burgundy percaline binding. Copy dedicated and signed by the author "A mon cher Confrère Henri Lecomte en affectueux et reconnaissant hommage". Good condition.