Sujidkanlaya Maruekarajtinplaeng และ Kanjana Chansa-ngavej. (2010) Diversity of soybean rhizobia in 16 subdistricts of phitsanulok province/. Chulalongkorn University,:ม.ป.ท.Sujidkanlaya Maruekarajtinplaeng และ Kanjana Chansa-ngavej. 2010. Diversity of soybean rhizobia in 16 subdistricts of phitsanulok province/. ม.ป.ท.:Chulalongkorn University,;Sujidkanlaya Maruekarajtinplaeng และ Kanjana Chansa-ngavej. Diversity of soybean rhizobia in 16 subdistricts of phitsanulok province/. ม.ป.ท.:Chulalongkorn University, 2010. Print.