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Varma S. K., . (2003). A Textbook of Plant Physiology & Bio Chemistry. New Delhi: S.Chand.
Varma S K, . 2003. A Textbook of Plant Physiology & Bio Chemistry. New Delhi: S.Chand.
Varma S K, . A Textbook of Plant Physiology & Bio Chemistry. New Delhi: S.Chand. 2003.