X.G: Various Programs, 1984-2005 Rare Book & Manuscript Library Carnegie Council on Ethics & International Affairs records, 1844-2008Series X: 2009 Addition, 2009
X.H: Photographs Rare Book & Manuscript Library Carnegie Council on Ethics & International Affairs records, 1844-2008Series X: 2009 Addition, 2009
Xia, Chang li (夏長禮) Rare Book & Manuscript Library Peter H.L. and Edith Chang papers, 1930s-2001Series I: Correspondence/系列一: 信函
X.I: Carnegie Anniversary Rare Book & Manuscript Library Carnegie Council on Ethics & International Affairs records, 1844-2008Series X: 2009 Addition, 2009
XII. Book Procurement Cases Approximately 30 folders Rare Book & Manuscript Library John Alden Jamieson papers, 1940-1952Series IV: File C
XI. Manuscript, Books for the Army Rare Book & Manuscript Library John Alden Jamieson papers, 1940-1952Series IV: File C
X.J: Publications Rare Book & Manuscript Library Carnegie Council on Ethics & International Affairs records, 1844-2008Series X: 2009 Addition, 2009
X.K: Ephemera Rare Book & Manuscript Library Carnegie Council on Ethics & International Affairs records, 1844-2008Series X: 2009 Addition, 2009
X.L: Audiovisual Rare Book & Manuscript Library Carnegie Council on Ethics & International Affairs records, 1844-2008Series X: 2009 Addition, 2009
X. Questionnaires Sent to librarians Rare Book & Manuscript Library John Alden Jamieson papers, 1940-1952Series IV: File C