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Subrahmanyan, R., Relwani, L.L. & Manna, G.B. Fertility build-up of rice field soils by blue-green algae. Proc. Indian Acad. Sci. 62, 252–272 (1965). https://doi.org/10.1007/BF03051570
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DOI: https://doi.org/10.1007/BF03051570