Wisit Thongkum. 2003. Aluminium adsorption in Rungsit series soil. Field of Study Environmental Technology, Mahidol University;
Wisit Thongkum. (2003) Aluminium adsorption in Rungsit series soil . Mahidol University/Bangkok.
Wisit Thongkum. Aluminium adsorption in Rungsit series soil. . Bangkok:Mahidol University, 2003.
Wisit Thongkum. (2003) Aluminium adsorption in Rungsit series soil . Mahidol University/Bangkok.