Sasitida Hungsavanich. (1999) Disinfection effect of ozone on microbial contamination in botanicals. Mahidol University,:ม.ป.ท.Sasitida Hungsavanich. 1999. Disinfection effect of ozone on microbial contamination in botanicals. ม.ป.ท.:Mahidol University,;Sasitida Hungsavanich. Disinfection effect of ozone on microbial contamination in botanicals. ม.ป.ท.:Mahidol University, 1999. Print.