Hall, H.S. . <br/><br/>
Elementary Trigonometry /  Textual Documents 
H.S.Hall & S.R.Knight. 
 - 4th ed. / 
 - New York :  Macmillan and co ,  1905. 
 - 415p. ;  18cm. 
<br/><br/><label>Subjects--Index Terms: </label>Trigonometry G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>514  / H 142 El