Porsche 917 Celebrates 50th Anniversary - The History and Achievements of the 917 in Amazon Prime Video's "The Grand Tour" - Porsche in the House - Owner's Blog
Porsche 917: Zuffenhausen's Le Mans and Can-Am Champion (Ludvigsen Library): Ludvigsen, Karl: 9781583881804: Amazon.com: Books
Porsche 917: Zuffenhausen's Le Mans and Can-Am Champion (Ludvigsen Library): Ludvigsen, Karl: 9781583881804: Amazon.com: Books