INTASIN, Arita, 		SOMPONGCHAIYAKUL, Penjai, AND 		SINGHRUCK, Patama.
" Soil Nutrients in Heterogeneities Land Use in Haui-Luang Headwater Area of  the Mekong River" <em>Journal of Environmental Management and Tourism</em> [Online], Volume 8 Number 5 (3 January 2018)