Obituaries
- R. M. Williams, Obituary: Bertha Jeffreys, The Independent (London), Wednesday, 22 December 1999.,
- Mary Walmsley, Lady Jeffreys 1903-1999, The Mathematical Gazette, Vol. 84, No. 500, pp. 321-323 (2000).
- J. A. Hudson, Lady Bertha Swirles, 1903-1999, Astronomy & Geophysics, Vol. 41, No. 3. 36-37 (2000).
Read more about this topic: Bertha Swirles