Bigyan Prabeshika: Dwitya Bhag /  Textual Documents 
Director of Public Instruction. 
 - 4th ed. / 
 - Assam :  Director of Public Instruction ,  1953. 
 - 114p. :  ill ;  20cm . 
<br/><br/><label>Subjects--Index Terms: </label>Science G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>509  / Ox 2 B