Jumras Limtrakul. 1992. Adsorption of ammonia on P-modified zeolite. Bangkok:Kasetsart University;
Jumras Limtrakul. (1992) Adsorption of ammonia on P-modified zeolite (รายงานผลงานวิจัย). Kasetsart University:Bangkok.
Jumras Limtrakul. Adsorption of ammonia on P-modified zeolite. Bangkok:Kasetsart University, 1992.
Jumras Limtrakul. (1992) Adsorption of ammonia on P-modified zeolite (รายงานผลงานวิจัย). Kasetsart University:Bangkok.