Sawaeng Ruaysoongnern. 2000. Nitrogen fixation of leguminous trees and nutrient cycling under agroforestry system of the northeast. Khon Kaen:Khon Kaen University;
Sawaeng Ruaysoongnern. (2000) Nitrogen fixation of leguminous trees and nutrient cycling under agroforestry system of the northeast. Khon Kaen University:Khon Kaen.
Sawaeng Ruaysoongnern. Nitrogen fixation of leguminous trees and nutrient cycling under agroforestry system of the northeast. Khon Kaen:Khon Kaen University, 2000. Print.
Sawaeng Ruaysoongnern. (2000) Nitrogen fixation of leguminous trees and nutrient cycling under agroforestry system of the northeast. Khon Kaen University:Khon Kaen.