Calder, Nigel (24 November 1966). "How New Scientist got started". New Scientist. Archived from the original on 22 October 2012. Retrieved 6 September 2017.
Calder, Nigel (24 November 1966). "How New Scientist got started". New Scientist. Archived from the original on 22 October 2012. Retrieved 6 September 2017.