Gupta, O. (1998). Modern weed management: With special reference to agriculture in the tropics ... Botanica.
Tohutoru Kātū Chicago (17th ed.)Gupta, O.P. Modern Weed Management: With Special Reference to Agriculture in the Tropics ... New Delhi: Botanica, 1998.
Tohutoro MLA (9th ed.)Gupta, O.P. Modern Weed Management: With Special Reference to Agriculture in the Tropics ... Botanica, 1998.
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