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Under what conditions may social contracts arise? : evidence from the Hanseatic league
Fink, Alexander, (2011)
Die Nowgoroder Schra in sieben Fassungen vom XIII. bis XVII. Jahrhundert
Schlüter, Wolfgang, (1916)
Očerki po istorii zemlevladenija i chozjajstva v Novgorodskoj zemle v XIV - XV vv.
Danilova, Ljudmila V., (1955)