The final shows of Ringling Bros and Barnum & Bailey in New York City prompted the New Yorker magazine to print a series of photos from the 1977 season in Madison Square Garden.
http://www.newyorker.com/culture/photo-booth/backstage-at-the-ringling-brothers-circus-1977
Ringling Brothers Barnum and Bailey Circus,
Madison Square Garden, NY, NY
April 1977