Sharma Yagya Dutta <br/><br/>
Sur sahitya aur siddhant: Sur ka, uske jeevan, sumkaleen paristhitiyoin, rachnaoin aur unki sahitik abhivyakti, bhasha, adhyatmik tatva-nirupan tatha manyatao aur paramparaoin ke addhar per mulyankan 

 - Delhi, India  Atma Ram and Sons   1955 
 - 159p. 
<br/><br/><label>Source: </label>Textual