Liu และผู้แต่งคนอื่นๆ. 1992. The environmental impact of development strategies on rural poor areas in China. Graduate School, Khon Kaen University;
Liu และผู้แต่งคนอื่นๆ. (1992) The environmental impact of development strategies on rural poor areas in China . Khon Kaen University/Khon Kaen.
Liu และผู้แต่งคนอื่นๆ. The environmental impact of development strategies on rural poor areas in China. . Khon Kaen:Khon Kaen University, 1992.
Liu และผู้แต่งคนอื่นๆ. (1992) The environmental impact of development strategies on rural poor areas in China . Khon Kaen University/Khon Kaen.