| Administration Report of the General Manager CGR for 1955 | B.D. | Rampala | 1955 | General |
| Administration Report of the General Manager Sri Lanka Railway, 1985 | Sri Lanka Railway | N/A | 1986 | General |
| Administration Report of the Municipal Council of Colombo for 1922 | Govt of Ceylon | N/A | 1922 | General |
| Administrative Report of the Director of National Museums for 1958 | National Museums | N/A | 1959 | General |
| Adult Literacy in Sri Lanka - Part 1, Survey Report | NATE | N/A | 1990 | General |
| Advent of the British to Ceylon, The | V.L.B. | Mendis | 1971 | History |
| Adventures in Reading | E.C.T. | Candappa | 2006 | Literature |
| Adventures in Steam, British Era | H. U. | Thibbotumunuwe | 2012 | General |
| Adventures of Andare, the Court Jester, The | Vijita | Fernando | 2002 | Literature |
| Adventures of Railwaymen, 1940 to 2005 | H. U. | Thibbotumunuwe | 2013 | General |
| Adventures of Senarat Bandara & Other Storis, The | Chitralekha | N/A | 1971 | Literature |
| Adventurous Journey From Peace to War, Insurgency To Terrorism | Cyril, General | Ranatunga | 2009 | General |
| Aesthetic & Cultural Aspects of Ambakke Devalaya in Kandy | R. C. | de S. Manukulasooriya | 2003 | Religion |
| After the Flames | Roderic | Grigson | 2017 | Literature |
| Agenda For A Just Society, An | N.U. | Jayawardena | 1977 | General |
| Aggamaha Panditha Polwatte Buddhadatta Thero | Anula | De Silva | 2017 | Religion |
| Agony of Sri Lanka, The | T.D.S.A. | Dissanayaka | 1984 | General |
| Agrarian Development Act, No 46 of 2000 | N/A | Govt of Sri Lanka | 2000 | Politics |
| Agricultural Credit In A Developing Economy - Ceylon | W.M. | Tilakaratna | 1963 | General |
| Agricultural Plan | Ministry of Agriculture | N/A | 1958 | General |
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