Arno W. F. Kolz, British Economic Interests in Siberia during the Russian Civil War, 1918–1920, The Journal of Modern History Vol. 48, No. 3 (Sep., 1976), pp. 483–491, at p. 488 note 30. Published by: The University of Chicago Press JSTOR1878749
Thomas S. Martin, The Urquhart Concession and Anglo-Soviet Relations, 1921—1922, Jahrbücher für Geschichte OsteuropasNeue Folge, Bd. 20, H. 4 (Dezember 1972), pp. 551–570, at p. 551 and p. 553. Published by: Franz Steiner Verlag. JSTOR41044614
Arno W. F. Kolz, British Economic Interests in Siberia during the Russian Civil War, 1918–1920, The Journal of Modern History Vol. 48, No. 3 (Sep., 1976), pp. 483–491, at p. 484. Published by: The University of Chicago Press JSTOR1878749
Thomas S. Martin, The Urquhart Concession and Anglo-Soviet Relations, 1921—1922, Jahrbücher für Geschichte OsteuropasNeue Folge, Bd. 20, H. 4 (Dezember 1972), pp. 551–570, at p. 557. Published by: Franz Steiner Verlag. JSTOR41044614