Title: Rāingān Kānsammanā Kānwičhai Prasitthiphāp khō̜ng Rōngrīan Prathommasưksā, Phatthayā, 3-5 Singhākhom 2520
Description: Proceedings of a seminar on the efficiency of elementary schools in Thailand.
Subjects: Congresses, Elementary Education
Places: Thailand