Title: Rāingān kānwičhai rư̄ang : kānsưksā panhā sangkhom læ sāthāranasuk khō̜ng khonngān kō̜sāng nai Phāk Nư̄a, Phō̜.Sō̜. 2537-2538
Description: Research report on hygiene and social problem of construction workers in the North.