On these pages, Larson is trying to show how the Columbian Exposition had an impact on American society and culture. Therefore, the main historical references on these pages have to do with popular culture.
The two most important references to popular culture on these pages are to Walt Disney and L. Frank Baum. Larson argues that both of these men’s careers might have been influenced by the fair. Disney, of course, produced Mickey Mouse and other cartoons and eventually the Disney empire we know today. Baum was the author of The Wonderful Wizard of Oz, which has become famous, mostly through the movie that was based on it. There are also references to how Frank Lloyd Wright was influenced by the fair, though Wright is not as much of a popular culture figure.
The references on these pages, then, are to the various impacts that Larson believes the Exposition had on American cultural history.