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| Book Title | Author |
| P | |
| Passenger Alcos in
Color (2) |
Boyd |
| (The) Passenger Car Library, Vol. 1: CB&Q (Budd) | Randall |
| (The) Passenger Car Library, Vol. 2: New York Central, North Eastern Railroads (Budd) | Randall |
| (The) Passenger Car Library, Vol. 15: Western Railroads (mislabeled as 15- should be 3) (Budd) | Randall |
| (The) Passenger Car Library, Vol. 4: Mid-Atlantic Railroads (Budd) | Randall |
| (The) Passenger Car Library, Vol. 5: Sante Fe, Southern Pacific (Budd) | Randall |
| (The) Passenger Car Library, Vol. 6: Southeastern Railroads (Budd) | Randall |
| (The) Passenger Car Library, Vol. 7: Southwestern Railroads (Budd) | Randall |
| Passenger Car Pictorial (Peer Marquette) | Million |
| Passenger Cars (1930s-1960s) (2 Books) | Wayner |
| Passenger Cars 1: Wooden Cars, Heavyweight Steel Cars | Carstens |
| Passenger Cars 2: Streamline Cars (2 Books) | Carstens |
| Passenger Cars of New England: Vol. 1 - Boston & Main (3) | Liljestrand |
| Passenger Cars of New England: Vol. 2 - Bangor & Aroostook(3) | Liljestrand |
| Passenger Cars of New England: Vol. 3 - Central Vermont & Rutland (3) | Liljestrand |
| Passenger Cars of the New Haven Railroad (3) | Sweetland |
| Passenger Trains of Northern New England in the Streamlined Era (2) | Holland |
| Passenger Trains of Yesteryear: Chicago Eastbound | Welsh |
| Passenger Trains of Yesteryear: Chicago Westbound | Welsh |
| Penn Central: Color Guide to Fgt & Pass. Equipment | Kincaid |
| Penn Central Railroad | Lynch |
| Penn Central Sampling | Taylor |
| Pennsy Electric Years |
Vokmer |
| Pennsy Electric Years, Vol. 2 | Pennybacker |
| Pennsy Electric Years, Vol. 3 | Fischer |
| Pennsy Power (1900-1957) | Staufer |
| Pennsy Power III (1847-1968) | Staufer |
| Pennsy Steam Years (3) | Pennybacker |
| Pennsy Streamliners: The Blue Ribbon Fleet (3) | Welsh |
| (The) Pennsy's P5 Electrics | Westing |
| Pennsylvania Diesel Power | Carleton |
| Pennsylvania Electric Pictorial | Zak & Wither |
| Pennsylvania Parlor Cars | Liljestrand |
| Pennsylvania Power, Steam & Electric | Staufer |
| Pennsylvania Railroad | Schaefer & Solomon |
| Pennsylvania Railroad, Color History | Blaszak |
| Pennsylvania Railroad, Color History | Schafer |
| Pennsylvania Railroad Color Pictorial: Vol One - Altoona to New York City | Sweetland |
| Pennsylvania Railroad Color Pictorial: Vol. Two - St. Louis to New York City | Sweetland |
| Pennsylvania Railroad Color Pictorial: Vol. Three - Chicago to Camden | Sweetland |
| Pennsylvania Railroad Color Pictorial: Vol. Four - Louisville to Washington, DC | Sweetland |
| Pennsylvania Railroad, Diesel Locomotive Pictorial - Vol. OneALCO RS series | Hahn |
| Pennsylvania Railroad, Diesel Locomotive Pictorial - Vol. TwoBaldwin Switchers and Road Switchers | Hahn |
| Pennsylvania Railroad, Diesel Locomotive Pictorial - Vol. ThreeSecond-Generation EMD Road Switchers | Hahn |
| Pennsylvania Railroad, Diesel Locomotive Pictorial - Vol. FourBaldwin Cab and Transfer Units | Hahn |
| Pennsylvania Railroad,
Diesel Locomotive Pictorial - Vol. FiveFairbanks-Morse Locomotives |
Withers |
| Pennsylvania Railroad, Diesel Locomotive Pictorial - Vol. SixEMD and ALCO Freight Cab Units | Withers |
| Pennsylvania Railroad, Diesel Locomotive Pictorial - Vol. SevenEMD E Units and ALCO PAs | Withers |
| Pennsylvania Railroad, Diesel Locomotive Pictorial - Vol. Eight | Withers |
| Pennsylvania Railroad, Diesel Locomotive Pictorial, Vol. Nine, Alco and GE Switchers | Withers |
| Pennsylvania Railroad, History of the - Vol. I | Wilson |
| Pennsylvania Railroad, History of the - Vol II | Wilson |
| Pennsylvania Railroad in Cincinnati | Tipton |
| Pennsylvania Railroad Line West, Vol. 1: Pittsburgh to St. Louis | Hipes/Oroszi |
| Pennsylvania Railroad
(Passenger Equipment of the) Vol. 1: Coaches |
Liljestrand |
| Pennsylvania Railroad (Passenger Equipment of the) Vol 2: Sleepers | Liljestrand |
| Pennsylvania Railroad (Passenger Trains, Consists and Cars) | Stegmaier |
| Pennsylvania Railroad, Standard Railroad of the World | Plant |
| Pennsylvania Railroad, Steam Years (2 Vols) | Sweetland/Fischer |
| Pennsylvania Railroad, Teller Paintings | Penn Central |
| (The) Pennsylvania Railroad (Under Wire) | Middleton |
| Pennsylvania-Reading Seashore Lines in Color | Stroup |
| Pennsylvania Station (The Late, Great) | Diehl |
| Pennsylvania Steam Years (1) | Sweetland |
| Pennsylvania Steam Years (2) | Fischer |
| Pere Marquette | Ivey |
| (The) Pere Marquette in 1945 | Chesapeake & Ohio Historical Society |
| Pere Marquette: Passenger Car Pictorial | Million |
| Pere Marquettes: Chesapeake & Ohio's | Dixon |
| Perfecting the American Steam Locmotive | Lamb |
| Pictorial History of America's Railroads: 150 Yrs of Railroading | Delvecchio |
| Picture History of American Transportation | Popular Mechanics |
| (The) Pioneer Zephyr | Rediske |
| (The) Pioneer Zephyr: America's First Diesel-Electric Stainless Streamliner | Byron |
| Pittsburgh & Lake Erie Railroad in color, Vol. 1: 1976-1992 | Borkowski |
| (The) Plant System | Turner |
| Popular Art Deco (2 copies) | Heide/Gilman |
| (The) Portman Company 1846-1982 | Fletcher |
| Portrait of the Alaska Railroad | Johnson |
| Portrait of the Pennsylvania Railroad | Nelson |
| Portrait of a Silver
lady: The Train They Called the California Zephyr |
MacGregor |
| Prairie Crossings | Changnon |
| (The) President Travels by Train | Withers |
| (The) President Travels by Train | Withers |
| PRR" Hudson to Horseshoe | Volkmer |