00294nam a2200109Ia 4500082002700000100002300027245006500050260004300115300001600158500000500174700000500179  a305.561095414bB743.SS  aBose, Pradip Kumar  aSocial strate among the tribes in tribal regions of Bengalb  aSuratbCentre for Social Studiesc1982  a154p. Bibl.  a  a