Punjab Textbook Board <br/><br/>
A textbook of algebra and trigonometry  : class XI 
Punjab Textbook Board 
 - Lahore:  Punjab Textbook Board,  1999. 
 -  429p. 
<br/><br/> pbk 
<br/><br/><br/>eng 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics-Study and teaching
<br/><br/><label>Dewey Class. No.: </label>372.7  / PUT