
Quoted in Edwin Hubble: Mariner of the Nebulae (1996) by Gale E. Christianson, p. 183.
Vanna Bonta Talks Sex in Space (Interview - Femail magazine)
Quoted in Edwin Hubble: Mariner of the Nebulae (1996) by Gale E. Christianson, p. 183.
An Outline of Philosophy Ch.15 The Nature of our Knowledge of Physics (1927)
1920s
Source: Science and Sanity (1933), p. 73.
Michael Halliday (2005, p. 68) as cited in: Andrew Halliday and Marion Glaser (2011) "A Management Perspective on Social Ecological Systems". In: Human Ecology Review, Vol. 18, No. 1, 2011.
1970s and later
Source: Adventures In Consciousness: An Introduction to Aspect Psychology (1975), pp.118-119
Source: Executable Uml: A Foundation for Model-Driven Architecture, 2002, p. xxiii: Foreword.
"Physics is always a gamble" http://www.thehindu.com/opinion/interview/nobel-laureate-david-gross-physics-is-always-a-gamble/article7383717.ece, an interview with David Gross by Shubashree Desikan, The Hindu (2015)