%0 Journal Article %T STUDY OF THE SURFACE OF PHOSPHORUS-CONTAINING FERTILIZER AND FEEDSTOCK BY EPISCOPIC MICROSCOPY %A Sabirov, R.F. %A , .. %A , .. %A Mahmutov, R.I. %A Krivosheev, E.A. %A Mishagin, K.A. %A Lukmanov, A.A. %A Gayrov, R.R. %K MICROSCOPY, SPENT ACID MIXTURE, FERTILIZER %J Herald of Technological University %D 2025 %N 28 %P 3 %I Kazan National Research Technological University