M. A. Kovrigin

• Obnovlenie rabochikh kadrov
• Podgotovka rabochikh kadrov v uslovii͡a︡kh nauchno-tekhnicheskoĭ revoli͡u︡t͡s︡ii
• Podgotovka rabochikh kadrov v usloviyakh nauchno-tekhnicheskoi revolyutsii