[1]
Umponstira, C., Kawayaskul, S., Chuchaung, S. and Homhaul, W. 2009. Effect of Ozone on Nitrogen Fixation, Nitrogenase Activity and Rhizobium of Cowpea (Vigna unguiculata (L.) Walp). Asian Health, Science and Technology Reports. 17, 3 (Dec. 2009), 213–220.