Kodachrome Memories #5: Parking Lot at the Pentagon, 1949(?)

This slide is purportedly an image of the Pentagon parking lot, but is not dated. The seller indicated that other slides in the same batch were dated 1949, which seems plausible given the design of the cars I can see. As always, if any car experts can chime in with some makes and models that would be a huge help.

Kodachrome Memories #5: Parking Lot at the Pentagon, Late 1940s(?)