Hobson,E.W. <br/><br/>
Treatise on plane trigonometry.- 2nded. 
by E.W.Hobson 
 - 2nded 
 - Cambridge  Cambridge University Press  1897 
 -  xv,360p. 
<br/><br/><label>Subjects--Index Terms: </label>Plane trigonometry 
<br/><br/><label>Universal Decimal Class. No.: </label>514.116  / HOB