National Council of Applied Economic Research. (1977). Techno-economic survey of Darjeeling tea industry. National Council of Applied Economic Research.
Chicago-referens (17:e uppl.)National Council of Applied Economic Research. Techno-economic Survey of Darjeeling Tea Industry. New Delhi: National Council of Applied Economic Research, 1977.
MLA-referens (8:e uppl.)National Council of Applied Economic Research. Techno-economic Survey of Darjeeling Tea Industry. National Council of Applied Economic Research, 1977.
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