Singh, R. (1987). Farm production in rainfed sub-mountains Punjab. B.R. Publishing.
Chicago-viite (17. p.)Singh, Rachhpal. Farm Production in Rainfed Sub-mountains Punjab. Delhi: B.R. Publishing, 1987.
MLA-viite (9. p.)Singh, Rachhpal. Farm Production in Rainfed Sub-mountains Punjab. B.R. Publishing, 1987.
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