Krickeberg, Klaus
Probability theory
Addison-Wesley, 1965
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Beckmann, Petr
Elements of applied probability theory
Harcourt, Brace & World, 1967
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Feller, William
An introduction to probability theory and its applications
John Wiley & Sons, 1968
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Stilson, Donald W.
Probability and statistics in psychological research and theory
Holden-Day, 1966
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Drake, Alvin W.
Fundamental of applied probability theory
McGraw-Hill, 1967
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