Abeydeera, Nilmini. <br/><br/>
Advanced Level TRIGONOMETRY. 

 - 1st Ed. 
 - Colombo :  Samudra Book Publications,  2019. 
 - 197 P. 
<br/><br/><label>ISBN: </label>9789556808506 
<br/><br/><label>Dewey Class. No.: </label>512  / ABE