| Robert Henry Leenbruggen | N/A | Journal of the D.B,U, | 1929 | XIX | 1 | 1 - 6 | General |
| Robert Knox | Blaze | Journal of the D.B.U. | 1910 | III | 1 | 32 - 46 | History |
| Robert Knox & the Dutch | Blaze | Journal of the D.B.U. | 1911 | IV | N/A | 13 - 18 | History |
| Robert Knox as Ornithologist | Raheem | Loris | 1986 | XVII | 4 | 176 - 177 | General |
| Robert Knox in the Kandyan Kingdom, 1660-1679: A Bio-Bibliographical Commentary | Goonetileke | Sri Lanka Journal of the Humanities, The | 1975 | 1 | 2 | 81 - 151 | History |
| Robert Knox's Ceylon | Muller | Journal of the D.B.U. | 1962 | LII | 1 & 2 | 1 - 5 | History |
| Robert Knox's Sinhalese Vocabulary | Ferguson | Journal of the Royal Asiatic Society | 1896 | XIV | 47 | 155 - 200 | History |
| Rock and Wall Paintings | Bandaranayake | Polity | July - August 2008 | 4 | 5 | 33 - 34 | General |
| Rock Fortress of Yapahuwa, The | Peiris | Ceylon Today | 1960 | 9 | 9 | 10 - 15 | History |
| Rock of Yapahuwa, The - An Ancient Citadel in Ceylon | Goonewardene | Ceylon Today | 1965 | 14 | 6 | 25 - 29 | History |
| Rock that Foxed Our Historians, The | Suraweera | Times of Ceylon Annual | 1973 | N/A | N/A | N/A | History |
| Rock-Cut Sculptures at "Isurumuni", The | De Leeuw | Ceylon Today | 1970 | XVIII | 7 & 8 | 35 - 47 | History |
| Role of English in Education at School Level in Sri Lanka, as Perceived by Parents, The | Rupasinghe | University of Colombo Review | 1983 | 1 | 3 | 71 - 88 | General |
| Role of Exports in Ceylon's Short-Run Income Fluctuations, The | Kannangara | Ceylon Journal of Historical & Social Studies, The | 1963 | 6 | 1 | 41 - 58 | General |
| Role of Informal Communication Network in a Multi-Shift Government Sector Business Organisation of a Developing Economy, The | Jayaratne | University of Colombo Review | 1986 | 6 | N/A | 35 - 45 | General |
| Role of Local Solidarity in Sri Lanka's Tsunami Diasaster Response, The | Harris | Polity | 2005 | 2 | 3 | 19 - 20 | General |
| Role of Non-Governmental Organisations in Wildlife Conservation | Fernando | Loris | 1988 | XVIII | 2 | 46 - 49 | General |
| Role of Small-Scale Industries in National Development, The | Perera | Ceylon Today | 1960 | 9 | 5 | 12 - 19 | General |
| Role of Sri Lanka Christians in a Buddhist Majority System, The | Caspersz | Ceylon Journal of Historical & Social Studies, The | 1974 | 4 (New Series) | 1 & 2 | 104 - 110 | Religion |
| Role of the Bureaucracy, The | Samaraweera | Ceylon Journal of Historical & Social Studies, The | 1974 | 3 (New Series) | 1 & 2 | 31 - 39 | Politics |
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