Ferrers, N.M. . <br/><br/>
An Elementary Treatise on Trilinear Coordinates /  Textual Documents 
N.M.Ferrers. 
 - 4th ed. / 
 - New York :  Macmillan and co ,  1890. 
 - 184p. :  ill ;  18cm . 
<br/><br/><label>Subjects--Index Terms: </label>Trilinear Coordinates G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>516.5  / F 414 S