Columbia subject headings:
Nowagrotzki, Max, 1860---Trials, litigation, etc.
Trials (Treason)--Russia (Federation)--Kaliningrad (Kaliningradskai︠a︡ oblastʹ)
Harvard subject headings:
Socialism--Soviet Union
Trials (Conspiracy)--Russia (Federation)--Kaliningrad (Kaliningradskai︠a︡ oblastʹ)
Princeton subject headings: