Subba Rao, N. S. (1988). Biofertilizers in agriculture (2nd ed.). Oxford & IBH Publishing Co. Pvt. Ltd..
Cita Chicago (17th ed.)Subba Rao, N. S. Biofertilizers in Agriculture. 2nd ed. New Delhi: Oxford & IBH Publishing Co. Pvt. Ltd., 1988.
Cita MLA (9th ed.)Subba Rao, N. S. Biofertilizers in Agriculture. 2nd ed. Oxford & IBH Publishing Co. Pvt. Ltd., 1988.
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