INVALUABLE SERVICE. NZ Signals Intelligence
D. Bell, C.Lord and M. Thatcher

Describes the secret activities of the many people and places involved in listening to and decoding signals during two world wars. This is the unseen contribution by what was known as SIGINT.

Resource Books, Waimauku, 2011. Softback. 433 pages, with index. NEW

Online Price: NZ $79.99 inc gst