He whakaaturanga anō
Rārangi pukapuka
McNeish, J. The sixth man: the extraordinary life of Paddy Costello. Auckland, 2013
Obit. The Times. 25 Feb. 1964: 15
Ovenden, K. A fighting withdrawal. Oxford, 1996
Rolfe, J. ‘There are spies among us’. Dominion. 21 Sept. 1999: 8
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