BEIN Za Zv76: Autograph: Robert Penn Warren: v.11,no.2.
BEIN Za Zv76: From the Robert Penn Warren Papers: v.11,no.2; v.23,no.1; v.35,no.2; v.41,no.3; v.51,no.2-3.
BEIN Za Zv76: From the library of Alfredo De Palchi: v.35,no.1.
BEIN YCAL MSS 43 Box 231: From the Ezra Pound Papers.
BEIN Gallup Eliot C351: From the Donald C. Gallup Collection of T.S. Eliot.