Census of India, 1991 <br/><br/>
Economic tables. Sikkim. V. 22 & v. 1, Pt. IIIB-B series, Table   B-2-3, B-6-7-8-9, B-12-13-14-15-16-17 to B-18    

 - Sikkim  Govt. Press           1991 
 - vii, 593p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.2793sN91, P0.22