Valdemar Poulsen
Valdemar Poulsen (23 November 1869 – 6 August 1942) was a Danish engineer who developed a magnetic wire recorder called the telegraphone in 1898. He also made significant contributions to early radio technology, including the first continuous wave radio transmitter, the Poulsen arc, which was used for a majority of the earliest audio radio transmissions, before being supplanted by the development of vacuum-tube transmitters. Provided by Wikipedia
1
by Poulsen, Valdemar
Kobenhavn : Bianco Lunos Bogtrykkeris A/S, 1964
Kobenhavn : Bianco Lunos Bogtrykkeris A/S, 1964
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Book
2
by Poulsen, Valdemar
Københaven : Kommissionaer: Munksgaard, 1966
Københaven : Kommissionaer: Munksgaard, 1966
This item is not available through EZBorrow. Please contact your institution’s interlibrary loan office for further assistance.
Book
3
by Poulsen, Valdemar
København : Kommissionaer : Munksgaard, 1963
København : Kommissionaer : Munksgaard, 1963
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Book
4
by Poulsen, Valdemar
København : Kommissionaer : Munksgaard, 1963
København : Kommissionaer : Munksgaard, 1963
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Book
5
by Poulsen, Valdemar
København : I komission hos Munksgaard, 1963
København : I komission hos Munksgaard, 1963
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Book
6
by Poulsen, Valdemar
København : [publisher not identified], 1964
København : [publisher not identified], 1964
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Book