TY JOUR TI EXPERIMENTAL DETERMINATION OF TIME AND NUMBER OF PERSONNEL FOR PERFORMING VARIOUS TYPES OF WORK AT A FIRE KW firefighting tactics KW fire KW firefighting operations KW training manual KW firefighting supervisor KW reference book JO Problems of risk management in the technosphere AU Osmanov, S.A. AU Klyuj, V.V. AU Zav'yalov, D.E. PY 2026 IS 2026 PB Saint-Petersburg University of State Fire Service of Emercom of Russia