| Revival of the Rubber Industry | Ratnapala | Ceylon Today | 1967 | 16 | 6 | 10 - 11 | General |
| Rhododendron | Fernando | Loris | 1997 | XXI | 4 | 159 | General |
| Richard Gabriel | Weereratne | Tourists' Ceylon | 1968 | 2 | 1 | 50 - 55 | General |
| Richard Gerald Anthonisz | Blaze | Journal of the D.B.U. | 1944 | XXXIII | 3 | 61 - 65 | General |
| Richard Gerald Anthonisz | N/A | Journal of the D.B.U. | 1930 | XIX | 4 | 163 - 176 | General |
| Riddle of the Red-Crocodiles at Yala National Park | Chambers | Loris | 1980 | XV | 3 | 177 | General |
| Ride the Uva Railway | Perera | Times of Ceylon Annual | 1974 | N/A | N/A | N/A | General |
| Ring of Waterfalls in Central Ceylon & Its Bearing on the Geological Structure & Earth Movement, The | Wadia | Spolia Zeylanica | 1941 | 23 | 1 | 19 - 20 | General |
| Rise & Fall of the Kingdom of Sitawaka (1521-1593), The | de Silva | Ceylon Journal of Historical & Social Studies, The | 1977 | 7 (New Series) | 1 | 1 - 43 | History |
| Rising in the East, A | de Alwis | Polity | 2004 | 2 | 1 | 17 - 19 | General |
| Ritigala | Fernando | Loris | 1968 | XI | 4 | 187 - 189 | General |
| Ritigala | Gunawardana | Loris | 1989 | XVIII | 3 | 110 - 112 | General |
| Ritigala Rendezvous | Allen | Loris | 1966 | X | 5 | 317 - 319 | General |
| Ritual Paintings of Sri Lanka | Sedaraman | Tourmaline | N/A | 1 | 2 | 31 - 35 | General |
| Rituals in a Developing Society With Special Emphasis on the Festival of New Rice at the Temple of the Tooth | Kariyawasam | Samskrti | 1983 | 17 | 1 & 2 | 79 - 103 | General |
| Road Accidents in Bird Life | Jayewardene | Loris | 1989 | XVIII | 4 | 156 - 157 | General |
| Road Communications in Dutch Times | Toussaint | Journal of the D.B.U. | 1931 | XXI | 1 | 31 - 41 | History |
| Road Ordinance of 1848, and the Kandyan Peasantry, The | Munasinghe | Journal of the Royal Asiatic Society | 1983-84 | XXVIII New Series | N/A | 25 - 44 | History |
| Road to Sri Pada, The | Senaveratna | Times of Ceylon Annual | 1957 | N/A | N/A | N/A | General |
| Roads of Ceylon, The | Williams | Ceylon Today | 1967 | 16 | 1 | 11 - 13 | General |
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