Shaoyu และผู้แต่งคนอื่นๆ. 1996. Accumulation of lead in some plants caused by motor traffic in Chiang Mai city. Graduate School, Chiang Mai University;
Shaoyu และผู้แต่งคนอื่นๆ. (1996) Accumulation of lead in some plants caused by motor traffic in Chiang Mai city . Chiang Mai University/Chiang Mai.
Shaoyu และผู้แต่งคนอื่นๆ. Accumulation of lead in some plants caused by motor traffic in Chiang Mai city. . Chiang Mai:Chiang Mai University, 1996.
Shaoyu และผู้แต่งคนอื่นๆ. (1996) Accumulation of lead in some plants caused by motor traffic in Chiang Mai city . Chiang Mai University/Chiang Mai.