See his autobiography, "Norman F Ramsey The Nobel Prize in Physics," http://ramsey.nbaoh.com/1.htm (accessed 06/22/2015)
His Obituary "Nobel laureate Norman Ramsey, 96," Harvard Gazette November 15, 2011, http://news.harvard.edu/gazette/story/2011/11/nobel-laureate-norman-ramsey-96/ (accessed 06/22/2015)
His New York Times Obituary Jascha Hoffmann, "Norman Ramsey Dies at 96; Work Led to the Atomic Clock," The New York Times, Nov. 6, 2011, http://www.nytimes.com/2011/11/07/us/norman-ramsey-dies-at-96-work-led-to-the-atomic-clock.html?ref=obituaries (accessed 06/22/2015)
For additional information and references, see: "Norman F. Ramsey - Biographical". Nobelprize.org. Nobel Media AB 2014. Web. 22 Jun 2015. <http://www.nobelprize.org/nobel_prizes/physics/laureates/1989/ramsey-bio.html>