Census of India 1961 <br/><br/>
Uttar Pradesh: village survey monograph, Chapnu (tahsil Chakrata, district Dehra Dun) 

 - Delhi  The Manager of Publications  1965 
 - 35+p. 
 - Census of India 1961. Volume XV, Uttar Pradesh. Part VI. No.24 .
<br/><br/><label>Dewey Class. No.: </label>A81x54 In2/61/Vol 15/Pt 6-24