“Introduction.” A Theory of Physical Probability, by RICHARD JOHNS, University of Toronto Press, Toronto; Buffalo; London, 2002, pp. 3–8, www.jstor.org/stable/10.3138/9781442670501.3. Accessed 23 Apr. 2021.
JOHNS, R. (2002). Introduction. In A Theory of Physical Probability (pp. 3-8). Toronto; Buffalo; London: University of Toronto Press. Retrieved April 23, 2021, from http://www.jstor.org/stable/10.3138/9781442670501.3
JOHNS, RICHARD. "Introduction." In A Theory of Physical Probability, 3-8. Toronto; Buffalo; London: University of Toronto Press, 2002. Accessed April 23, 2021. http://www.jstor.org/stable/10.3138/9781442670501.3.
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