Vittal P R <br/><br/>
Trigonometry 
Vittal P R 
 - 3rd ed. 
 - Chennai  Margham Publications   2015 
 - 196 
<br/><br/>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>514