Census of India 1981 Arunachal Pradesh: households and household population by language mainly spoken in the household - Shillong Director of Census Operations 1987 - 235+p. - Census of India 1981. Series-25, Arunachal Pradesh. Paper 1 of 1987 . Dewey Class. No.: A81x54 In2/81/25/Pap1/1987