Hali , H.S. <br/><br/>
Elementary trigonometry 

 - NA 
 - Toronto  1979 
 - xv,382 
<br/><br/><label>ISBN: </label>NA 
<br/><br/><label>Subjects--Personal Names: </label><br/>Mathematics
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humanities and Natural sciences