Census of India, 1971 <br/><br/>
General population tables , General economic tables , Social and cultural tables , Migration tables , Fertility tables Sikkim  V.18A, Pt. A,B,C,D,F. 

 - Sikkim  Govt. Press           1971 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.2973sN71, L1.18A-2A-F