Title: Dūai čhongrak læ phakdī 50 pī Rōngrīan Tō̜Chō̜Dō̜
Description: History and development of the border petrol police schools in Thailand; volume brought out at 50th founding anniversary of the first school in Chiang Rai Province, Northern Region; contains articles on promotion and educational support to the 192 border petrol police schools throughout the country.