Das Gupta, Pranab Kr. Impact of tea plantation industry on the life of tribal labourers / by Pranab Kr Das Gupta and Iar Ali Khan. - / . - NULL : Unknown , 1979. - viii,79p. : ills. charts ; 24cm . Includes index ISBN: RS0.00 (PB) Subjects--Index Terms: SOCIAL SCIENCES Dewey Class. No.: 305.9633 / DAS/I