Sone Bhongaraya และผู้แต่งคนอื่นๆ. (2009) Geomorphology and Formation of Gravel Beds along the Ping and the Wang Rivers at Tak, Northern Thailand. <i>Bulletin of Earth Sciences of Thailand (BEST)</i>, <i>2</i>(2-Jan), 19-Nov.Sone Bhongaraya และผู้แต่งคนอื่นๆ. "Geomorphology and Formation of Gravel Beds along the Ping and the Wang Rivers at Tak, Northern Thailand". Bulletin of Earth Sciences of Thailand (BEST) 2 (2009):19-Nov.Sone Bhongaraya และผู้แต่งคนอื่นๆ. Geomorphology and Formation of Gravel Beds along the Ping and the Wang Rivers at Tak, Northern Thailand. Department of Geology, Chulalongkorn University:ม.ป.ท. 2009.