By Bivens Irl C.   Klein Benjamin   in Mathematics Magazine

ISSN:1930-0980|88|1|39-51

Mathematical Association of America‎(2015)‎

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By Bivens Irl C.   Holshouser Arthur L.   Klein Benjamin G.   in Mathematics Magazine

ISSN:1930-0980|81|4|276-284

Mathematical Association of America‎(2008)‎

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