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200 1 $aHYPERBOLIC functions$fprepared by George F. Becker and C. E. Van Orstrand.
210   $aWashington$cSmithsonian institution$d1909
215   $aLI, 321 p.$cill.$d24 cm
300   $aSmithsonian mathematical tables
610 0 $aFunzioni iperboliche
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