Jehnson, W.E. . <br/><br/>
Treatise on Trigonometry /  Textual Documents 
W.E.Jehnson. 
 - 1st ed. / 
 - Sl :  Sn ,  1889. 
 - 497p. :  ill ;  18cm . 
<br/><br/><label>ISBN: </label> HB 
<br/><br/><label>Subjects--Index Terms: </label>Trigonometry G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>516  / J 639 T