00909nam--2200325---450-99000332098020331620090928122936.0000332098USA01000332098(ALEPH)000332098USA0100033209820090928d1980----km-y0itay50------baengUSa---||||001yyRiddles in mathematicsa book of paradoxesEugene P. NorthropHarmondsworthPenguin books1980239 p.ill.18 cmPelician booksGiochi matematici793.74NORTHROP,Eugene P.127310ITsalbcISBD990003320980203316793.74 NOR9695/CBS793.7400328501BKSCIRSIAV79020090928USA011229Riddles in mathematics782875UNISA