Todhunter, I. <br/><br/>
Key to Todhunter and Hogg's plane trigonometry / 
by I. Todhunter and R. W. Hogg 
 - London :  Macmillan,  1895 
 - 482 p. ;  19 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry--Problems, exercises, etc.<br/>Plane Trigonometry--Problems, exercises, etc.
<br/><br/><label>Dewey Class. No.: </label>514.5