Ivanyuk E, Suprunchuk V. ABOUT THE POSSIBILITY OF USING THE RED SLADGE IN THE SYNTHESIS OF INORGANIC PIGMENTS COFFE-BROWN COLOUR. usc [Internet]. 2023 May 30 [cited 2024 Nov. 22];1(usc18-01):41-4. Available from: https://proconference.org/index.php/usc/article/view/usc18-01-003