Richard Divall (December 2001). "The Marshall-Hall Trust"(PDF). Review. No. 14. Archived from the original(PDF) on 30 March 2018. Retrieved 16 April 2018.
Richard Divall (December 2001). "The Marshall-Hall Trust"(PDF). Review. No. 14. Archived from the original(PDF) on 30 March 2018. Retrieved 16 April 2018.