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- Thacker, T. W. (1 Titles)
- Theis, Johannes (1 Titles)
- Thierry, G. J. (1 Titles)
- Thiersch, Hermann (4 Titles)
- Tholus, Anna (2 Titles)
- Thompson, Herbert (5 Titles)
- Tiesenhausen, Waldemar (3 Titles)
- Till, Walter C. (5 Titles)
- Tirard, Mary (1 Titles)
- Todrous, Selim Mohareb (9 Titles)
- Torge (1 Titles)
- Torrey, Charles Cutler (1 Titles)
- Trenner, Albert (1 Titles)
- Trofimowitsch, A. (1 Titles)
- Tulli, Alberto (4 Titles)
- Turaieff, Boris (7 Titles)