Real Photo from 1964-1965 World's Fair in New York City (just seems like something from "Zany Afternoons" by Bruce McCall --if you click on this link you'll get to an interesting talk by him)!
"The lifelike (and life-size) dinosaurs attracted more crowds of children. New Yorkers all remembered the day the dinosaurs came down the river. The huge models had been made in upstate New York. They were so large that the only way to get them to the fair was to float them on barges down the Hudson River. Thousands of people were caught in the traffic jam on the highway beside the river the day the monsters were moved downstream..." Another Actual Photo, This Time of...sigh...dinosaur being dismantled at 1964 New York World's Fair...
"But He Probably Did!" an arresting coloring book picture in tribute to Coloring Book King Steven A. at Plastic Pumpkins! (Actually, I think an artisty someone did this--not sure who, 'though. And, it might have been around for awhile. sigh. I'm always the last one to find stuff.)