The Mathematical Association of American .
The American Mathematical Monthly Vol.97, No.2, Feb 1990 \ The Mathematical Association of American . - New York : The Mathematical Association of American , 1990 . - 171 p.
4/4/1455
The American Mathematical Monthly Vol.97, No.2, Feb 1990 \ The Mathematical Association of American . - New York : The Mathematical Association of American , 1990 . - 171 p.
4/4/1455
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