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Research and Development Journal, Loei Rajabhat University
ISSN: 2774-1109 (Online)
Proceedings
Research and Development Institute, Loei Rajabhat University
234 Loei-Chaingkhan Rd., Muang Sub-District, Muang District, Loei Province 42000, Thailand
Tel : (+66) 8664 37010 Fax : (+66) 4281 3061
Email : [email protected]