Rai, Priyada Ranjan . <br/><br/>
Bijnan O Biswajagat /  Textual Documents 
Priyada Ranjan Rai. 
 - 1st ed. / 
 - Calcutta :  Biswabharati Granthalai ,  Nd. 
 - 52p. :  ill ;  18cm . 
<br/><br/><label>Subjects--Index Terms: </label>Science and World G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>509  / R 13 B