Dubey, S K D . <br/><br/>
Spherical Trigonometry and Special Astronomy /  Textual Documents 
S K D Dubey. 
 - 1st ed / 
 - Delhi :  Swastik Publishers & Distributors ,  2007. 
 - 310 p ;  23 cm. 
<br/><br/><label>ISBN: </label> HB 
<br/><br/><label>Subjects--Index Terms: </label>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>516.24  / Du 851 Te