Pavlovskaya, N.E., Yushkova, E.I. and Danilenko, A.N. 2019. HPLC Study of Humus Acids Isolated from Composts and Vermicomposts of Different Period of Matured. Sorbtsionnye i Khromatograficheskie Protsessy. 10, 3 (Nov. 2019).