Bergersen, Fraser J. (2004). "Eric John Hewitt. 27 February 1919-1 January 2002". Biographical Memoirs of Fellows of the Royal Society. 50: 147–155. doi:10.1098/rsbm.2004.0011. S2CID83853876.
Bergersen, Fraser J. (2004). "Eric John Hewitt. 27 February 1919-1 January 2002". Biographical Memoirs of Fellows of the Royal Society. 50: 147–155. doi:10.1098/rsbm.2004.0011. S2CID83853876.