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2009-06-03, avg 8.5 free (pdf)
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* a tutorial on the first 3 normal forms by fred coulson* free pdf poster available by marc rettig* description of the database normalization basics by microsoft
*a tutorial on the first 3 normal forms by fred coulson*description of the database normalization basics by microsoft
Ultimo aggiornamento 2016-03-03
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== libros ==* "sam loyd's book of tangram puzzles" (isbn 0-486-22011-7): autor sam loyd* "mathematical puzzles of sam loyd" (isbn 0-486-20498-7): seleccionados y editados por martin gardner* "more mathematical puzzles of sam loyd" (isbn 0-486-20709-9): seleccionados y editados por martin gardner* "the puzzle king: sam loyd's chess problems and selected mathematical puzzles" (isbn 1-886846-05-7): editados por sid pickard* "the 15 puzzle" (isbn 1-890980-15-3): por jerry slocum y dic sonneveld* "sam loyd's cyclopedia of 5000 puzzles, tricks and conundrums with answers" (isbn 0-923891-78-1)* "sam loyd and his chess problems" por alain c. white* "sam loyd: his story and best problems", by andrew soltis, chess digest, 1995, (isbn 0-87568-267-7)== véase también ==* ajedrez* henry dudeney== referencias ==== enlaces externos ==* the sam loyd cyclopedia of puzzles - el libro completo, de 1914, escaneado y de dominio público (en inglés)* sam loyd's puzzles - el libro completo, de 1912, escaneado en color (free pdf download) (en inglés)* - puzzle interactivo de sam loyd (en inglés)*entrada en chessmetrics sobre loyd (en inglés)* sam loyd official site - incluye biografía y puzzles (en inglés)
==books==* "sam loyd's book of tangram puzzles" (isbn 0-486-22011-7): by sam loyd* "mathematical puzzles of sam loyd" (isbn 0-486-20498-7): selected and edited by martin gardner* "more mathematical puzzles of sam loyd" (isbn 0-486-20709-9): selected and edited by martin gardner* "the puzzle king: sam loyd's chess problems and selected mathematical puzzles" (isbn 1-886846-05-7): edited by sid pickard* "the 15 puzzle" (isbn 1-890980-15-3): by jerry slocum and dic sonneveld* "sam loyd's cyclopedia of 5000 puzzles, tricks and conundrums with answers" isbn 0-923891-78-1* "sam loyd and his chess problems" by alain c. white==see also==* henry dudeney==references====further reading==* "sam loyd: his story and best problems", by andrew soltis, chess digest, 1995, isbn 0-87568-267-7==external links==* sam loyd company site – includes biography and his puzzles* biography from the school of mathematics and statistics website at the university of st andrewschess*chessmetrics entry for loydinteractive puzzle* farmer and wife to catch rooster and hen – interactive sam loyd's puzzle* solve loyd's 16 squares puzzle interactivelybooks* the sam loyd cyclopedia of puzzles – the complete 1914 book by sam loyd (public domain) scanned** math games – the sam loyd cyclopedia of puzzles, by ed pegg jr., january 3, 2005 – announcement of scans and overview** index of math puzzles, by don knuth
Ultimo aggiornamento 2016-03-03
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