| PARSBRO (L) | The Three Cents Postal Stationary Card of North Borneo [1997] | N/A |
| PARSONS (C.R.H.) | Slogan Postmarks of the Eighties [1990] | Mechanisation |
| PARSONS (C.R.H.) | Slogan Postmarks of the United Kingdom 1917-69 [1974] | Mechanisation |
| PARSONS (Cyril R H), | The slogan postmarks of Great Britain:an illustrated reference catalogue [1962] with consolidated supplement to the geneeral & miscellaneous sections of the 2nd edition [1970] | Mechanisation |
| PARSONS (Cyril R H), | Local publicity slogan postmarks, an illustrated reference catalogue of local publicity slogan postmarks of the UK [1970] | Great Britain, Local, Mechanisation |
| PARSONS (Harry G) | Early routings of the Royal Mail Steam Packet Company 1842-1879 | Maritime |
| PASSMORE (Michael) | Die postgeschichte der Nurnberger Reichsparteitage – The postal history of the Nurnberg Rallies | Germany |
| PATTON (Donald Scott) | The private local posts of the United States: volume 1, New York State. A study of the hsitory of the adhesive stamps with their reprints & forgeries [1967] | Local, United States |
| PATTON (Donald Scott) | Hamburg [1963] | Germany |
| PATTON (Donald Scott) | Farthing delivery: fight for cheaper postage [1960] | Great Britain |
| PAWLYN (Tony) | The Falmouth Packets 1689-1851 [2003] | Maritime |
| PAYNE (Eric) | Ethiopia… postmarks & cancellations to 1936 [1982] | N/A |
| PEACE (Brian R) | Australasian wreck mail [1997] | Maritime |
| PEACH (Jack) | UK machine marks: an illustrated list of marks made by rapid cancelling machines [1979] | Mechanisation |
| PEACHEY (C.G.) | Slogan Postmarks of the Eighties | N/A |
| PEACHEY (C.G.) | Slogan Postmarks of the United Kingdom 1917-69 | N/A |
| PEACHEY (Colin G), | The Slogan Postmarks of Great Britain: an illustrated reference catalogue | N/A |
| PEACHEY (Colin G), | Local publicity slogan postmarks, an illustrated reference catalogue of local publicity slogan postmarks | Great Britain, Local |
| PEARSON (G.R.) | Slogan Postmarks of the Eighties | N/A |
| PEARSON (G.R.) | Slogan Postmarks of the United Kingdom 1917-69 | N/A |
| PEARSON (George R) | Special event postmarks of the United Kingdom [1963] | N/A |
| PEARSON (George R) | The slogan postmarks of Great Britain:an illustrated reference catalogue | N/A |
| PEARSON (George R) | Local publicity slogan postmarks, an illustrated reference catalogue of local publicity slogan postmarks | Great Britain, Local |
| PEARSON (PC) | The Postal History of Iraq [1996] | N/A |
| PEEL (Eric G) | St Petersburg: the Imperial Post – its postmarks and other postal markings [2001] | N/A |
| PEET (Gordon) | British postal rates 1937-2000: Dulac, Wilding and Machin issues; including the reasons why each | Great Britain |
| PEGG (R E F) | Norfolk Penny Posts [1976] | Great Britain |
| PEGGIE (P) | Cross-Border Mail via Northern Rhodesia [2011] | N/A |
| PEKER (Ugur A) | Osmanli Imparatorlugu idari taksimat ve post s ubeleri 1890 (the administrative division & post offices in the Ottoman Empire as at A.H. 1306 / A.D. 1890) [1984] | N/A |
| PENNYCUICK (K) | The Postal History of German East Africa | N/A |
| PENNYCUICK (K) | The Postal History of German East Africa [1989] | N/A |
| PENNYCUICK (K) | The War in East Africa (1914-1918), [1968] | Military |
| PENNYCUICK (K) | German mailboat services Hamburg to East Africa 1890-1914.[1976/77] | Maritime |
| PENNYCUICK (Kenneth | The Nyasaland-Rhodesia Field Force 1914-18, a postal history | N/A |
| PERRIN (R) | Les Types de Boites aux Lettres & ?? 1st April 1830 ?? | France |
| PERRY (AB) | The History of the Post & Communications of Northampton and | Great Britain |
| PERRY (C R) | The Victorian Post Office: the growth of a bureaucracy [1992] | Great Britain |
| PERSOFF (Meir) | The running stag, the stamps & postal history of Israel [1973] | N/A |
| PETERSON (Donald J) | Postal history of the Spanish Philippines 1565-1898 [2000] | N/A |
| PETRADAKIS (Michael S) | Postal history of the Aegean Islands Italian military post offices (1897-1943) [1991] | N/A |
| PETRUICK (Stefan) | Stadtpostamter im besetzten Polen 1915-1918 [1985] | WW1 |
| PHILADELPHIA | Official Guide Post Office, July 1891 | N/A |
| PHILATELIC CONGRESS of GREAT BRITAIN | Year Books from 1939 to 1991 | N/A |
| PHILATELIC CONGRESS of GREAT BRITAIN | A glossary of philatelic terms compiled…by a sub-committee…[1933] Pt 1 Philatelic Terms; Part 2: Technical Trems relating to scientific methods [1951] | N/A |
| PHILBRICK (M E) | The Packet Captains of Flushing, Cornwall 1689-1915 [1982] | Maritime |
| PHILITEX92 | First international philatelic literature exhibition [28 Oct-2 Nov 1992] in North America: | N/A |
| PHILLIPS (D G) Ed | The American Stampless Cover Catalog 2 vols [1985-87] | N/A |
| PHILLIPS (Harold David) | The air age: being the bound volume of the 1944 Air Mail magazine | Aviation |
| PHILLIPS (P) | New Hebrides, Cancellation Study, 1892-1980 [1995] | N/A |
| PHIPPS (John S) | The stamps and posts of Albania and Epirus 1878 to 1945 [1996] | N/A |
