N., N. “Knud Jessen Og Ragnar Spärck: Danish Scientific Investigations in Iran. 141 St. (27X19 cm), 111. Einar Munksgaard. Copen Hagen 1939. Pris: Kr. 10”. Geografisk Tidsskrift - Danish Journal of Geography 43 (January 1, 1940). Accessed December 23, 2025. https://tidsskrift.dk/geografisktidsskrift/article/view/48281.