风化煤、褐煤、泥炭腐植酸原料中提取腐植酸方法的改进
풍화매、갈매、니탄부식산원료중제취부식산방법적개진
Study on the Improved Method of Extracting Humic Acid from Weathered Coal, Lignite and Peat of Humic Materials
저자의 최근 논문