Singh, B. B. (2016). Agriculture for competitive examinations (1.). Daya publishing house.
Chicago Stili AlıntıSingh, B B. Agriculture for Competitive Examinations. 1. New Delhi: Daya publishing house, 2016.
MLA AlıntıSingh, B B. Agriculture for Competitive Examinations. 1. Daya publishing house, 2016.
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