1. Interview Rob Herber with G Holton, 21 September 2007
2. Bentinck-Smith W and Stouffer E. History of Named Chairs. Harvard University, Cambridge (1991)
3. Harvard Class of 1921. Twenty-fifth Anniversary Report. Harvard University, Cambridge (1946)
4. Bloembergen N. (ed) Encounters in Magnetic Resonances. World Scientific, Singapore (1996)
5. World Scientific Series in 20th Century Physics;Nicolaas Bloembergen,1996