Title: On Ultra Active Service – The Story of Australia’s Signals Intelligence Operations during World War 2

Author: Ballard, Geoffrey

Condition: Very Good +

Edition: 1st Edition

Publication Date: 1991

ISBN: 0867862742

Cover: Hard Cover without Dust Jacket – 370 pages

Comments: The history of Australian Army Signals Intelligence. Tremendous and extremely well researched Australian military/unit history on the enormous and valuable performances of the signals intelligence services during World War Two.

The author served in the No. 4 Australian Special Wireless Section on code breaking.