TY JOUR TI FIFTY-YEAR PATH OF THE INSTITUTE OF WITNESSES STATE PROTECTION DEVELOPMENT IN THE WORLD AND ITS IMPLEMEN- TATION IN THE PENAL SYSTEM OF THE RUSSIAN FEDERATION KW state protection of witnesses KW participants in criminal proceedings KW security measures KW institutions and bodies of the penal system KW witness protection programme KW economic opportunities KW national law JO Man: crime and punishment AU Kiselev, M.. AU Kiselev, A.. PY 2019 IS 27 PB Academy of the FPS of Russia