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Engineer Valdemar Poulsen at His Station For Wireless Telegraphy in Lyngby and in his Laboratory 1913 Directed by Anker Kirkeby Ingeniør Valdemar Poulsen paa sin station for traadløs telegrafi i Lyngby og i sit laboratorium
Valdemar Poulsen at his station for wireless telegraphing in Lyngby.
