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Caroe, Olaf (January 1960). "Biography: Not in the Limelight". International Affairs. 36 (1). Blackwell Publishing: 93–94. doi:10.2307/2609344. JSTOR2609344.
Porter, Brian (January 1971). "Biography: Lord Ismay". International Affairs. 47 (1). Blackwell Publishing: 145–146. doi:10.2307/2614717. JSTOR2614717.