Making Buicks in the Seventies

The New Book of Knowledge.  New York:  Grolier Inc., 1979.

All of the robots must have been on a break.

Although this picture was published in 1979, Mister G comments: 

"I think that pic is actually older than the seventies. I really think I see a 1963 Riviera in front  and a 63 Skylark following it. (which is weird for a production line)."