Anon Suksawad. (2008) Available Silica for Rice in the Lower North Region. <i>Thai Agricultural Research Journal</i>, <i>26</i>(1), 91-105.Anon Suksawad. "Available Silica for Rice in the Lower North Region". Thai Agricultural Research Journal 26 (2008):91-105.Anon Suksawad. Available Silica for Rice in the Lower North Region. Department of Agriculture:ม.ป.ท. 2008.