| In Sunshine & Colours - Butterflies | Gunawardene | Ceylon Observer Pictorial | 1971 | N/A | N/A | N/A | General |
| In the Land of the Singing Fish | Kulatunga | Loris | 1997 | XXI | 4 | 147 - 150 | General |
| In The Medawachchiya Wilderness | Kulatunga | Loris | 1997 | XXI | 4 | 154 - 156 | General |
| In Wilderness is the Preservation of the World | Clarke | Loris | 1988 | XVIII | 2 | 71 | General |
| Inauguration of the King in Ancient Ceylon, The | Fernando | Journal of the Royal Asiatic Society | 1896 | XIV | 47 | 125 - 130 | History |
| Incredible Voyage of Captain James Holman, The | de Silva | Ceylon Observer Pictorial | 1972 | N/A | N/A | N/A | History |
| Independence of the Judiciary | Tambiah | Ceylon Journal of Historical & Social Studies, The | 1977 | 7 (New Series) | 2 | 61 - 68 | General |
| Indian Immigrant in Pre-Independent Ceylon, The | Bastiampillai | University of Colombo Review | 1983 | 1 | 3 | 27 - 34 | General |
| Indian Immigration to Ceylon - The First Phase c. 1840-1855 | de Silva | Ceylon Journal of Historical & Social Studies, The | 1961 | 4 | 2 | 106 - 137 | General |
| Indian Immigration to Ceylon, the First Phase c1840-1855 - A Comment | Vanden Driesen | Ceylon Journal of Historical & Social Studies, The | 1964 | 7 | 2 | 218 - 229 | General |
| Indian Paradise Flycatcher | Abeywardena | Loris | 1984 | XVI | 6 | 281 | General |
| Indigenous Arts & Crafts in Ceylon | Wickramaratne | Festival of Arts Souvenir | 1949 | N/A | N/A | 42 - 43 | General |
| Indigenous Medicine & Herbal Plants | Fernando | Loris | 1981 | XV | 5 | 288 - 290 | General |
| Indigenous Orchids of Sri Lanka | Wickramasinghe | Loris | 1991 | XIX | 3 | 108 - 110 | General |
| Indigenous Orchids of Sri Lanka | Fernando | Loris | 1980 | XV | 3 | 141 - 145 | General |
| Indo-Ceylon Trade & Economic Relations | Hewavitharana | Ceylon Historical Journal, The | 1969 - 1970 | 19 | 1, 2, 3 & 4 | 83 - 173 | General |
| Indo-Sri Lanka Trade: Intensities & Complementarities | Bandara | Sri Lanka Studies Conference | 1999 | N/A | N/A | 1 - 24 | General |
| Industrial Development & Urban Growth - A Case Study of the Colombo Region | Rasanayagam | University of Colombo Review | 1985 | 5 | N/A | 20 - 40 | General |
| Industrial Development in Ceylon | N/A | Ceylon Today | 1964 | 12 | 7 | 21 - 27 | General |
| Industrial Structure, Change & Spatial Distribution of Manufacturing Employment in Sri Lanka | Rasanayagam | University of Colombo Review | 1987 | 7 | N/A | 52 - 66 | General |
|
|
