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200 1 $aGeometrical researches on the theory of parallels$fNicholas Lobachevski$gtranslated from the original by George Bruce Halsted
210   $aChicago$cOpen Court pub.$d1914
215   $a50 p$d24 cm
700  1$aLobachevskii,$bNikolai Ivanovich$f<1792-1856>$cmatematico russo$042183
702  1$aHalsted,$bGeorge Bruce$f<1853-1922>
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