Shervatov, V. G. <br/><br/>
Hyperbolic functions/ 
Translated and adapted from the 2d Russian ed. (1958) by A. Gordon Foster and Coley Mills, Jr. 
 - Boston:  Heath,  [1963]. 
 - 55 p.:  illus.,  21 cm. 
 - Topics in mathematics .
<br/><br/><label>LCCN: </label>61017846 /L/r932 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Exponential functions.
<br/><br/><label>Dewey Class. No.: </label>515.5  / S553h