Tolong jelaskan mengenai Bacaan tambahan dari Georgy Chicherin

Gorvin, J. H. "Soviet Russia: Some Observations." Journal of the British Institute of International Affairs 5.2 (1926): 61–78. online

Meyendorff, Baron Alexander. "My Cousin, Foreign Commissar Chicherin." The Russian Review 30.2 (1971): 173–178. online