Lek Wantha. 2016. A study into the effectiveness of crystallization process in purification of active pharmaceutical ingredients. Chon Buri:Burapha University;
Lek Wantha. (2016) A study into the effectiveness of crystallization process in purification of active pharmaceutical ingredients (รายงานผลงานวิจัย). Burapha University:Chon Buri.
Lek Wantha. A study into the effectiveness of crystallization process in purification of active pharmaceutical ingredients. Chon Buri:Burapha University, 2016.
Lek Wantha. (2016) A study into the effectiveness of crystallization process in purification of active pharmaceutical ingredients (รายงานผลงานวิจัย). Burapha University:Chon Buri.