Prasad , Gorakh . <br/><br/>
Text Book on Spherical Astronomy /  Textual Documents 
Gorakh Prasad & N.Saran. 
 - 5th ed. / 
 - Allahabad :  Pothishala Ltd. ,  1973. 
 - 277p. ;  22cm. 
<br/><br/>Index 
<br/><br/><label>Subjects--Index Terms: </label>Astronomy Spherical Astronomy G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>523  / P 886 T