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Hamman และผู้แต่งคนอื่นๆ. 1991. Nitrogen dynamics during rice culture using Sesbania rostrata as green manure in Northeast Thailand. , University of Alberta;
Hamman และผู้แต่งคนอื่นๆ. (1991) Nitrogen dynamics during rice culture using Sesbania rostrata as green manure in Northeast Thailand . University of Alberta/Edmonton, Alberta.
Hamman และผู้แต่งคนอื่นๆ. Nitrogen dynamics during rice culture using Sesbania rostrata as green manure in Northeast Thailand. . Edmonton, Alberta:University of Alberta, 1991.
Hamman และผู้แต่งคนอื่นๆ. (1991) Nitrogen dynamics during rice culture using Sesbania rostrata as green manure in Northeast Thailand . University of Alberta/Edmonton, Alberta.