Film Study: Wizard of Oz (1939)

https://en.wikipedia.org/wiki/The_Wizard_of_Oz_(1939_film)#/media/File:WIZARD_OF_OZ_ORIGINAL_POSTER_1939.jpg

Our next movie is The Wizard of Oz. It stars Judy Garland, who was married to the director of An American in Paris, Vincente Minelli. Are there other ties to movies we have already watched?

This movie intersects two of our themes this year, musicals and movies from 1939. I wonder if you will think this is the best movie of 1939 like most critics believe.