Siras Sulanchupakorn และ Kanjana Chansa-ngavej. (2006) Expression of nodulation and nitrogen fixation genes in 6 strains of bradyrhizobium japonicum under different temperatures. Chulalongkorn University:ม.ป.ท.Siras Sulanchupakorn และ Kanjana Chansa-ngavej. 2006. Expression of nodulation and nitrogen fixation genes in 6 strains of bradyrhizobium japonicum under different temperatures. ม.ป.ท.:Chulalongkorn University;Siras Sulanchupakorn และ Kanjana Chansa-ngavej. Expression of nodulation and nitrogen fixation genes in 6 strains of bradyrhizobium japonicum under different temperatures. ม.ป.ท.:Chulalongkorn University, 2006. Print.