ClALDEA, R. “LA SPEDIZIONE DELL’I.N.G. A KHARTOUM IN OCCASIONE DELL’ECLISSE TOTALE DI SOLE DEL 25/2/1952”. Annals of Geophysics 5, no. 3 (November 25, 1952): 409–416. Accessed April 19, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/5853.