| Treasure Island - Gems | Trimmer | Tourists' Ceylon | 1968 | 1 | 3 | 34 - 39 | General |
| Treasures of the Seas | Ekanayake | Observer Pictorial | 1996 | N/A | N/A | N/A | General |
| Treaty of 1766 | N/A | Journal of the D.B.U. | 1963 | LIV | 1 - 4 | 55 - 56 | History |
| Treaty of 1766 Between the King of Kandy and the Dutch, The | Reimers | Ceylon Historical Journal, The | 1953 | 2 | 3 & 4 | 265 - 274 | History |
| Tree of Life | Kannangara | Loris | 1977 | XIV | 3 | 153 | General |
| Tree of Life, The - Coconut Palm | Perera | Times of Ceylon Annual | 1966 | N/A | N/A | N/A | General |
| Trees | Gunawardana | Loris | 1993 | XX | 1 | 19 - 21 | General |
| Trees Around the Kandy Lake | Collure | Loris | 1986 | XVII | 4 | 147 - 150 | General |
| Trends & Differentials of Mortality Change in Sri Lanka, 1921-1979 | Dissanayake | University of Colombo Review | 1987 | 7 | N/A | 28 - 38 | General |
| Trends & Prospects for Ceylon Tea | Motha | Ceylon Journal of Historical & Social Studies, The | 1963 | 6 | 2 | 101 - 110 | General |
| Trends in Modern Sinhalese Literature | Mahindapala | Ceylon Today | 1960 | 9 | 10 | 26 - 28 | Literature |
| Trends of Urbanization in Ceylon 1901-1953 | Panditthratna | Ceylon Journal of Historical & Social Studies, The | 1964 | 7 | 2 | 203 - 217 | General |
| Trial of In Depth Fencing Against Elephants | Neusinger | Loris | 1984 | XVI | 6 | 315 - 317 | General |
| Tribute to Caroline Maud Weinman | Brohier | Journal of the D.B.U. | 1962 | LII | 3 & 4 | 23 - 26 | General |
| Tribute to Our Late Prime Minister | Rodrigo | Ceylon Today | 1964 | 12 | 9 | 12 - 14 | Politics |
| Tridactylidae & Gryllidae of Ceylon, The | Chopard | Spolia Zeylanica | 1936 | XX | 1 | 9 - 87 | General |
| Trincomalee - Famed British Naval Base | N/A | Ceylon Observer Pictorial | 1968 | N/A | N/A | N/A | General |
| Trincomalee - Key to Orient | Brohier | Journal of the D.B.U. | 1941 | XXX | 3 | 82 - 89 | General |
| Trincomalee Saga 1709 to1957 | Ferdinand | Journal of the D.B.U. | 1958 | XLVIII | 2, 3 & 4 | 71 - 83 | History |
| Trip to Wavulpane Cave, A | Dharmawansa | Loris | 1992 | XIX | 6 | 190 - 193 | General |
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