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| Book Title | Author |
| L | |
| L&N: Louisville & Nashville: Color Guide to Fgt. & Pass. Equip., Vol 1 | Johnson |
| L&N: Louisville & Nashville: Color Guide to Fgt. & Pass. Equip., Vol 2 | Johnson |
| Lackawanna Railroad in Color (1) | Sweetland |
| Lackawanna Railroad (In Color), Vol. 2 | Plant |
| Lackawanna Railroad (In Color), Vol. 3 - The Transition Years | Canfield |
| Lackawanna Railroad Trackside with Henry W. Peterson | Del Vecchio |
| Lackawanna, Superpower RR of the NE | LeMassena |
| Lackawanna Railroad: The Merchant's Engines, Loco Study 2 | Segrue |
| Lake Michigan Passenger Steamers | Hilton |
| (The) Lakeside and Marblehead Railroad | Fick |
| (The) Lakeshore & Michigan Southern Railway | McLellan |
| Landmarks of 20th Century Design (Earl Court) | Hiesinger |
| (The) Last Steam Railroad in America | Garver |
| Last Train to Paradise (Henry Flagler) | Standiford |
| Lehigh Valley - 2 (In Color) | Yanosey |
| Lehigh Valley - 3 (In Color) | Plant |
| Lehigh & Hudson River in color | Boyd |
| Lehigh Valley Memories | Marcham |
| Lehigh Valley Railroad (A History of) - Rte. Of Black Diamond | Archer |
| Lehigh Valley Railroad: The Wyoming and Buffalo Divisions | Bednar |
| Lehigh Valley Railroad (A History of) - Rte. Of Black Diamond | Archer |
| Leisure and Entertainment in America | Braden |
| Lifelines (Bio of Richard Trevithick) | Trevithick |
| Life on the River | Wayman |
| Lima: The History | Hirsimaki |
| (The) Lincoln Funeral Train | Trostel |
| Limiteds, Locals, and Expresses in Indiana 1838-1971 | Sanders |
| Lionel: A Century of (3) | Ponzol |
| Lionel: America's Favorite Toy Trains (2) | Souter |
| Lionel Catalogs, Vol.
I: 1902-1922 |
Greenberg |
| Lionel Catalogs, Vol. V: 1995-1960 | Greenberg |
| Lionel Catalogs Vol. VI: 1961-1969 | Ambrose |
| Lionel Trains 1945-1969, Vol. I: Motive Power & Rolling Stock | Ambrose |
| Lionel Trains 1945-1969 Vol. II: Motive Power & Rolling Stock | Lavoie |
| Lionel Trains 1901-1942
0 Greenberg's Guide, Vol II, O & OO |
Greenberg |
| Lionel Trains 1945-1969-Greenberg's Guide to Lionel Trains 1945-1959 Vol. III, Catalog Sets, Second Edition | Ambrose |
| Lionel Trains 1970-1991, Vol. I: Greenberg's Guide | Ambrose |
| Lionel Trains 2001 | Ponzol |
| Lionel Trains: Standard of the World, 1900-1943 (2 copies) | TCA (Fraley) |
| Lionel Trains 1900-1942: Standard Catalog of (2) | Doyle |
| Lionel Trains 1945-1969 | Doyle |
| Loco 1 - the Diesel | Carstens Public. |
| Locomotive | Solomon |
| Locomotives in Profile | Reed |
| Locomotives that Baldwin Built | 1831-1923 |
| Long Island Railroad Calendar | |
| Long Island Railroad (a pictorial record of the steam-to-diesel transition east of Jamaica) | Kramer |
| (A) Long Look at Steam | Olmsted |
| (The) Lore of the Train | Ellis |
| Louisville & Nashville in Color, Vol. 1 | Borkoski |
| Louisville & Nashville Passenger Trains: The Pan American Era, 1921-1971 (2) | Castner |
| Louisville & Nashville Railroad 1850-1963 | Herr |
| Louisville & Nashville Railroad: The Old Reliable | Castner |
| Louisville & Nashville Steam Locomotives | Prince |
| Luxury Trains, Orient Express to TGV | Behrend |