Thanks, Jackie, for your confidence; unfortunately I don't know this film which probably didn't circulate in Australia.

The Jam Handy Organisation was a prolific maker of 'industrial' documentaries in the middle years of the last century.

The major film connected with the 1939 World's Fair was 'The City', a famous 44-minute documentary produced for the Fair, directed and photographed by Ralph Steiner and Willard Van Dyke, with music by Aaron Copland and a commentary by Lewis Mumford.

"traces the historic stages in the growth of cities in the U.S. ending in a prescription for the future by the group of city planners who sponsored the film. The filmmakers make imaginative use of a range of techniques from montage to candid camera and bring a sense of poetic rhythm to the depiction of life in Manhattan."

I don't know whether it has surfaced on DVD yet.