Somwan Srichareon. 2007. Removal of hydrogen sulfide by treated palm oil mill effluent as an absorbent. Bangkok:King Mongkut's University of Technology Thonburi;
Somwan Srichareon. (2007) Removal of hydrogen sulfide by treated palm oil mill effluent as an absorbent (รายงานผลงานวิจัย). King Mongkut's University of Technology Thonburi:Bangkok.
Somwan Srichareon. Removal of hydrogen sulfide by treated palm oil mill effluent as an absorbent. Bangkok:King Mongkut's University of Technology Thonburi, 2007.
Somwan Srichareon. (2007) Removal of hydrogen sulfide by treated palm oil mill effluent as an absorbent (รายงานผลงานวิจัย). King Mongkut's University of Technology Thonburi:Bangkok.