| 4450 | 4200 | Stuart Piggott | West Kennet long barrow Wiltshire | 1971 | E/62.2 | Piggot |
| 4451 | 328 | edited by W T Pike | Sussex in the twentieth century + contempory biographies | 1910 | E/15 | Sussex |
| 4452 | 4403 | Pilgrim Press | Dunrobin Castle : seat of the Countess of Sutherland | 1978 | M/08 | Scotla |
| 4453 | 4223 | J B Pinkerton | Air treatment engineer : a practical journal for the practical engineer | 1949 | WCP | Pinker |
| 4454 | 7534 | Point Properties Ltd | The Pinto Collection of wooden bygones : a short guide, with illustrations | 1957 | E/33.2 | Pinto |
| 4455 | 7064 | Pitkin Pictorials | Beaulieu Palace House and the Abbey | | M/08 | Hampsh |
| 4456 | 4400 | Pitkin Pictorials | The pictorial guide to the Tower of London | | M/08 | London |
| 4458 | 4533 | Colin Platt | Medieval Britain from the air | 1984 | E/65.4 | Platt, |
| 4459 | 7803 | Colin Platt | The architecture of medieval Britain : a social history | 1990 | B/01.0 | Platt, |
| 4460 | 3942 | C Platt and R Coleman-Smith | Excavations in medieval Southampton 1966-1970 | ? | E/61.8 | Platt, |
| 4461 | 5408 | Karel Plicka et al | Walks through Prague -: photographic guide | 1984 | B/01.0 | Plicka |
| 4462 | 7273 | Thomas Plowman | Craft pottery | 1976 | E/33.7 | Plowma |
| 4463 | 713 | Plumber & Decorator | The plumber and decorator and journal of gas and sanitary engineering | 1888 | WCP | Plumbe |
| 4464 | 3256 | Plumber & Decorator | The plumber and decorator and journal of gas and sanitary engineering | 1908 | WCP | Plumbe |
| 4465 | 4291 | Plumber and Journal of Heating | Journal No. 923 | 1955 | WCP | Plumbe |
| 4466 | 4467 | Plumbing Trades' Union | PTU members cards of rules | | WCP | Plumbi |
| 4467 | 4469 | Plumbing Trades' Union | Plumbing Trades' Union Journal | 1947-1955 | WCP | Plumbi |
| 4468 | 4470 | Plumbing Trades' Union | Plumbing Trades' Union Journal | 1956-1966 | WCP | Plumbi |
| 4469 | 2765 | Emanuel Poche | Prazske Portaly (Portals in Prague) | 1947 | B/06.3 | Poche, |
| 4470 | 5501 | Abbe Pohu | The Royal Abbey of Fontevraud | | B/26 | France |
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