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khwanchai liphaophan
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Rāingān kānsưksā rư̄ang phāp rūam ʻutsāhakam mư̄angrǣ Thai
Dūangčhai ʻInthraprawit, Sō̜rayut Mīnaphan, Khwanchai Līphaophan · Sathāban Wičhai phư̄a Kānphatthanā Prathēt Thai
63 sayfa · 1991
Mineral industries / Mines and mineral resources / Government policy