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- * [[Dirk van Dalen|van Dalen, D.]], ''Logic and Structure'', 2nd edition, Springer-Verlag, Berlin, Germa * [[Paul Richard Halmos|Halmos, P.R.]], ''Naive Set Theory'', D. Van Nostrand Company, Princeton, NJ, 1960.40 KB (6,049 words) - 15:24, 16 November 2012
- * van Dalen, Dirk (1980), ''Logic and Structure'', 2nd edition, Springer-Verlag, Berlin, Germ * Halmos, Paul Richard (1960), ''Naive Set Theory'', D. Van Nostrand Company, Princeton, NJ.25 KB (3,665 words) - 21:04, 16 November 2015