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Lindsay Rogers (يوليو 1964). "The Inquiry: American Preparations for Peace, 1917-1919 by Lawrence E. Gelfand". Geographical Review. ج. 54 ع. 3: 260–462. DOI:10.2307/212676.
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Peter Grose (1996). "The Inquiry". The Council on Foreign Relations from 1921 to 1996. The Council on Foreign Relations. مؤرشف من الأصل في 2016-03-03.