James Oliver Murdock, Harold J. Tobin, Henry S. Fraser, Francis O. Wilcox and Willard B. Cowles. "International Judicial Settlement Trends" Proceedings of the American Society of International Law at Its Annual Meeting (1921-1969) Vol. 34, (May 13–15, 1940) JSTOR25657027 (p. 125-148)
"First World War". www.nationalarchives.gov.uk. Retrieved Dec 1, 2022.
openlibrary.org
Bernstein, Herman (1918) The Willy-Nicky Correspondence: Being the Secret and Intimate Telegrams Exchanged between the Kaiser and the Tsar.. Knopf, New York. OL23360533M, OCLC332762
Bernstein, Herman (1918) The Willy-Nicky Correspondence: Being the Secret and Intimate Telegrams Exchanged between the Kaiser and the Tsar.. Knopf, New York. OL23360533M, OCLC332762