Yupa Luangprab. 1991. Academic performance across years in mathematics and Thai language of pupils with and without pre-elementary school training in Petchaboon, Thailand. Field of Study Educational Management, Central Luzon State University;
Yupa Luangprab. (1991) Academic performance across years in mathematics and Thai language of pupils with and without pre-elementary school training in Petchaboon, Thailand . Central Luzon State University/Nueva Ecija.
Yupa Luangprab. Academic performance across years in mathematics and Thai language of pupils with and without pre-elementary school training in Petchaboon, Thailand. . Nueva Ecija:Central Luzon State University, 1991.
Yupa Luangprab. (1991) Academic performance across years in mathematics and Thai language of pupils with and without pre-elementary school training in Petchaboon, Thailand . Central Luzon State University/Nueva Ecija.