DR.Muhammad Abdur Sattar <br/><br/>
Higher Trignometry 

 - 4th 
 - Dhaka  Ali Publication   1997 
 -  157 
<br/><br/><label>Subjects--Personal Names: </label>
<br/><br/><label>Subjects--Corporate Names: </label>
<br/><br/><label>Dewey Class. No.: </label>516.24/S253h