| Prince of Wales Eastern Book, The - Voyages of HMS Renown 1921-22 | N/A | N/A | 1922 | General |
| Prince Vijaya Pala of Ceylon 1634-1654, The | P.E. | Pieris | 1928 | History |
| Princes In All The Earth - A Study of Children in Society in Sri Lanka | Kenneth. M | De Lanerolle | 1981 | General |
| Principles of Ceylon Law | H.W. | Tambiah | 1972 | General |
| Prison Statistics of Sri Lanka - Vol 5, 1986 | Prison Headquarters | Statistics Division | 1986 | General |
| Prisoner of Paradise, The | Romesh | Gunesekera | 2012 | Literature |
| Prisoners of the Boer War in Ceylon & Dutch East Indies | R. L. | Brohier | 2015 | General |
| Prisoners of the Japanese | Roger | Bourke | 2006 | General |
| Prisoner\'s Gold, The | Chris | Kuzneski | 2015 | Literature |
| Problem of Nachiketas, The | J. F. | Samaranayake | 1973 | Literature |
| Problems of Ceylon History | G.C. | Mendis | 1967 | History |
| Problems of Public Life In India and Ceylon | T.W. | Roberts | N/A | General |
| Proceedings of the Legislative Council - Ordinary Session | Govt of Ceylon | N/A | 1884 | Politics |
| Prodigal Son & Other Stories, The | B.R. | Blaze | 1965 | Literature |
| Prodromus Faunae Zeylanicae - E.F.Kelaart | Rohan | Pethiyagoda | 1998 | General |
| Prodromus Faunae Zeylanicae: Being Contributions to the Zoology of Ceylon | E.F. | Kelaart | 1852 | General |
| Production and Marketing of Banana in Beminiwatte | M.P. | Perera | 1976 | General |
| Production of Other Crops in Paddy Fields in Yala 1972 | A.S. | Ranatunga | 1974 | General |
| Professional, The | Ashok | Ferrey | 2013 | Literature |
| Profile of Ceylon\'s Catholic Heritage, A | Francis. O, Rev. | Tambimuttu | 1961 | Religion |
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