Reference : 6838.18,6838.19,6838.20,6838.21,6838.22,6838.23
Name of creator(s) : Keyes, Charles F.
Scope and content : Ban Nong Tun, Thambon Khwao, Amphoe Muang, Changwat Maha Sarakham, Thailand,east=103.41014; north=16.12766
Extent and medium : Slide ดูเอกสารต้นฉบับ