Source: Paul A. Samuelson, “We can have sound debt policy” from the Washington Post, included with Extention of remarks of Hon. Jeffery Cohelan of California in the House of Representatives, Friday, May 31, 1963 in Congressional Record: Proceedings and Debates. Volume 109, part 25—Appendix, May 31, 1963, p. A3510
Also found as a mimeographed copy in Harvard University Archives. Papers of Alvin Harvey Hansen, Box 1, Folder “Business Cycles.”
Image Source: Samuelson Memorial Information Page/Photos from Memorial Service. Accessed via the Internet Archive Wayback Machine.