Census of India, 1991 <br/><br/>
Economic tables. Sikkim. V 22, Pt. IIIB-B series, Table   B-19(f), B-20(f), B-21(f), B-22(f), B-23(f), B-24(f)    

 - Sikkim  Govt. Press           1991 
 - vii, 398p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.2973sN91, P1.22