Census of India 1981 <br/><br/>
Bihar: handicraft survey report, carpet craft of Obra village 

 - Delhi  Controller of Publications  1989 
 - 100+p. 
 - Census of India 1981. Series-4, Bihar. Part-XD .
<br/><br/><label>Dewey Class. No.: </label>A81x54 In2/81/4/PT10D/C