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| Public International Relations | Krishna Prasanna | Mukerji | 1965 | General |
| Public Investment 1986-1990 | Ministry of Finance & Planning | N/A | 1986 | General |
| Public Sector Reforms in Sri Lanka: An Empirical Study | Ramanie | Samaratunga | 2001 | General |
| Public Service Regulations of the Ceylon Government, The | N/A | N/A | 1947 | General |
| Public Writings on Sri Lanka | Charles, Prof | Sarvan | 2009 | General |
| Pugwash, Globalization & Eppawala - Pugwash Betrayed ? or Eppawala Betrayed ? | D. L. O. | Mendis | 2000 | General |
| Pul Eliya - A Village in Ceylon (Land Tenure & Kinship) | E.R. | Leach | 1971 | General |
| Punchirala | K. | Jayatilaka | 1992 | Literature |
| Puppet Theatre of Asia, The | J. | Tilakasiri | 1968 | General |
| Puppetry in Ceylon | J. | Tilakasiri | 1961 | General |
| Puppetry in Sri Lanka | J. | Tilakasiri | 1976 | General |
| Pursuing A Vision of Justice | Senaka | Weeraratna | 2022 | General |
| Pybus Embassy To Kandy, The, 1762 (With Notes by Raven-Hart) | P.E.P. | Deraniyagala | 1958 | History |
| Python of Pura Malai & Other Stories, The | Carl | Muller | 1995 | General |
| QASLU Remonstrances to Sri Lanka & Australia in April 1987 | QASLU | N/A | 1987 | General |
| QASLU Statements on the Sri Lankan Crisis | QASLU | N/A | N/A | General |
| Quaint, Gaunt Saint - Hilaire Jansz | Hilaire | Jansz | 1963 | General |
| Quarterly Bulletin of Statistics - Vol 1, No 1, 1950 | Dept of Census & Statistics | N/A | 1950 | General |
| Quarterly Bulletin of Statistics - Vol 1, Nos 2 & 3, 1950 | Dept of Census & Statistics | N/A | 1950 | General |
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