Neerun, N. and Rao, S. (1965) “Interrelationship between Azotobacter and Clostridium in Increasing The Yield of Paddy and Nitrogen Uptake”, Agriculture and Natural Resources. Bangkok, Thailand, 5(1), pp. 10–15. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/240591 (accessed: 18 September 2026).