Apiluck EIAD-UA และ Buntita JOMHATAIKOOL;Kajornsak FAUNGNAWAKIJ;Sanchai KUBOON;Wasawat KRAITHONG;Sutee CHUTIPAICHIT;Masayoshi FUJI. (2019) Effect of humic acid extracted from Thailand's leonardite on rice growth. <i>Journal of Metals, Materials and Minerals</i>, <i>29</i>(1), 1-7.Apiluck EIAD-UA และ Buntita JOMHATAIKOOL;Kajornsak FAUNGNAWAKIJ;Sanchai KUBOON;Wasawat KRAITHONG;Sutee CHUTIPAICHIT;Masayoshi FUJI. "Effect of humic acid extracted from Thailand's leonardite on rice growth". Journal of Metals, Materials and Minerals 29 (2019):1-7.Apiluck EIAD-UA และ Buntita JOMHATAIKOOL;Kajornsak FAUNGNAWAKIJ;Sanchai KUBOON;Wasawat KRAITHONG;Sutee CHUTIPAICHIT;Masayoshi FUJI. Effect of humic acid extracted from Thailand's leonardite on rice growth. Metallurgy and Materials Science Research Institute, Chulalongkorn University:ม.ป.ท. 2019.