TY JOUR TI STUDY OF THE SURFACE OF PHOSPHORUS-CONTAINING FERTILIZER AND FEEDSTOCK BY EPISCOPIC MICROSCOPY KW MICROSCOPY KW SPENT ACID MIXTURE KW FERTILIZER JO Herald of Technological University AU Sabirov, R.F. AU , .. AU , .. AU Mahmutov, R.I. AU Krivosheev, E.A. AU Mishagin, K.A. AU Lukmanov, A.A. AU Gayrov, R.R. PY 2025 IS 28 PB Kazan National Research Technological University