Nichanun Karbkesorn และ Kanjana Chansa-ngavej. (2009) Use of multiplex PCR to predict nodulation of rhizobia isolated from root nodules of soybeans grown in Bang Rakam district soils, Phitsanulok province. Chulalongkorn University:ม.ป.ท.Nichanun Karbkesorn และ Kanjana Chansa-ngavej. 2009. Use of multiplex PCR to predict nodulation of rhizobia isolated from root nodules of soybeans grown in Bang Rakam district soils, Phitsanulok province. ม.ป.ท.:Chulalongkorn University;Nichanun Karbkesorn และ Kanjana Chansa-ngavej. Use of multiplex PCR to predict nodulation of rhizobia isolated from root nodules of soybeans grown in Bang Rakam district soils, Phitsanulok province. ม.ป.ท.:Chulalongkorn University, 2009. Print.