Note 13 — Chapter XII · MAPPING AND CHARTING FROM THE AIR (Figs. 54 to 82)
Reading edition
J. Volmat: Application de la photographie aérienne aux levés hydrographiques, Comptes Rendus de l’Acad. des Sci. [de Paris], Vol. 169, 1919, Oct. 27, pp. 717-718; idem: Rapport sur la mission photohydrographique de Brest (1919), Annales Hydrogr. (publ. by Service Hydrographique de la Marine, Paris), 3rd Series, 1919-20, pp. 191-220, with seven air photographs and corresponding sections from French coast charts.