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On 16 December 1939 scientists at Wits University successfully tested a radar set, known as the JB, which they had designed and built themselves after receiving secret technical data from England. Soon afterwards a military unit, Special Signals Services, orSSS, came into being...
Binding: Soft
Book Condition: Intact but with signs of wear. See photos. I added a new photo of the same book with a white background. it is protected by cellophane.
Edition: First / only 1993
Pages: 229
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