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Principia mathematica, vol. 1 (of 3)

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Project Gutenberg EPUB3 edition Whitehead, Alfred North and Russell, Bertrand

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[60]Math. Annalen, vol. LXV. Heft 2, February 1908.

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Principia mathematica, vol. 1 (of 3), Project Gutenberg eBook #78050

*73. SIMILARITY OF CLASSES. *74. ON ONE-MANY AND MANY-ONE RELATIONS WITH LIMITED FIELDS.