This was the cover of the Summer 1957 edition of Glamour Photography. I tried to find more information about the magazine but my Google search took me to some pretty weird places so I guess this cover (and the “glamour studio on wheels” blurb) will just have to speak for itself.
This cover was done by Rafael De Soto. I’ve shared a lot of De Soto’s work on this site. Apparently, in the 50s, farm girls would get all dressed up and sit at the side of the road while photographers cruised up and Route 66, searching for legs to photograph. This cover is both innocent and tawdry. I hope no one got in the car.