References

Anukun, S., 1999. Management of archaeological sites and environment by government and private organizations: A case study of city boundary and fence in pongsanuk community. Ph.D. Thesis, Chaingmai University, Chiangmai, Thailand.

Mingkwan, C., 2008. Guidelines for Conservation, Revitalization and Development of the Identity and Customs of the Kula Ethnic Group in Northeast Thailand. Maha Sarakham University, Thailand, pp: 2.

Pichai, S., 2002. Cooperation in Preserving Local Arts and Cultures of Local Administrative Officers and People in Surattani Province. Srinakarindharavirot University, Bangkok, pp: 1.

Rattana, R., 1982. Northeastern Geography (Pumisart Pak Tawanoorg Chieangnua). Tipaksorn Printing, Bangkok, pp: 50-70.

The Department of Fine Arts, 2000. The project on studying the second burial ceremony in thung kula roi hai culture. Department of Fine Arts Region 10, The Ministry of Culture, Roi-et, Thailand, pp: 10.

The Department of Fine Arts, 2001. Observation on thung kula roi hai history. The Department of Fine Arts Region 10, Ministry of Culture, Roi-et, Thailand, pp: 19-20.

Watcharin, S., 2008. Indigenous Knowledge for Khao Hom Mali Rice Production and Development for Export in the Thung Kula Rong Hai Plain. Maha Sarakham University, Thailand, pp: 8.