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[Transcript of the letter of Theodore Roosevelt appointing Superintendent O.H. Tittmann to the International Boundary Commission, 1908]
- "Theodore Roosevelt, President of the United States"@en
- "Letter of Theodore Roosevelt appointing Superintendent O.H. Tittmann to the International Boundary Commission, 1908"@en
- "[Transcript of the letter of Theodore Roosevelt appointing Superintendent O.H. Tittmann to the International Boundary Commission, 1908]"@en