Kairbekov Z, Ermoldina E, Erezhep N, Shingisova R, Myltykbaeva Z. Chemical properties of humic acids. Chemical Bulletin of Kazakh National University [Internet]. 1Dec.2011 [cited 22Nov.2024];64(4):114-7. Available from: https://chemistry.kz/bulletin/index.php/kaznu/article/view/511