Reference pack by Ref-G
http://www.fotoref.com/products/1950s-american-cars
UPDATE: Two more cars have been added: Packard and Studebaker.
Powerful futuristic car designs of an Atomic Age.
Content:
1951 Studebaker Champion (21 photos)
1953 Chevrolet Bel Air (39 photos)
1955 De Soto V8 Powerfly (28 photos)
1957 Pontiac Star Chief (41 photos)
1958 Packard Hawk (26 photos)