Dube, Mahendra Nath <br/><br/>
Bhasha, bhasha-vigyan aur rajbhasha hindi / 
Dube, Mahendra Nath. 
 - New Delhi:  Vani Prakashan,  2010. 
 - 291p.; 22cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9789350002230 
<br/><br/><label>Dewey Class. No.: </label>491.43 DUB