| Reflections of Faith | Manel | Abhayaratna | 1996 | Religion |
| Reflections On Lalith | Lalith Athulathmudali Foundation | N/A | 1994 | Politics |
| Reflections on the Constitution & The Constituent Assembly | L.J.M. | Cooray | 1971 | Politics |
| Regeneration - Ceylon Photography 1850 | N/A | N/A | 2000 | General |
| Regiment de Meuron, The (From DBU Journals) | N/A | N/A | 1964 | General |
| Regional Administration in Sri Lanka | Neil | Fernando | 1973 | General |
| Regional Geography of Ceylon, A | S.F. | De Silva | 1954 | General |
| Regional Powers & Small State Security - India & Ceylon | K.M. | de Silva | 1995 | General |
| Register of Ancient Monuments | Ministry of Cultural Affairs | N/A | 1972 | History |
| Register of Museums and Collections of Antiquities in Sri Lanka | Ministry of Cultural Affairs | N/A | N/A | General |
| Rehabilitation After Violence | N/A | N/A | 1984 | General |
| Reign of Ten Kings, A - 500BC - 1200AD | Nalini | De Lanerole | 1999 | History |
| Reign of Terror in Jaffna | Colombo Study Circle | N/A | 1981 | General |
| Reimagining Sri Lanka - Northern Ireland Insights | M. | Somasunderam | 1999 | General |
| Rejoinders to India & The European Community on Sri Lanka | QASLU | N/A | 1986 | General |
| Relative Merits - Memoir of the Bandaranaike Family of Sri Lanka | Yasmine | Gooneratne | 1986 | General |
| Relics of Old Ceylon | St Nihal | Singh | N/A | History |
| Relief & Rehabilitation of Displaced Persons - A Humanitarian Effort in Sri Lanka | N/A | N/A | 1983 | General |
| Religion & Culture in the Development of Human Rights in Sri Lanka | D., Dr | Wesumperuma | 1982 | General |
| Religion & Development in Asian Societies | Marga | N/A | 1974 | Religion |
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