Radio addresses by Sol Bloom, Congressman from New York, associate director, George Washington Bicentennial Commission: Mothers' day, broadcast by National Broadcasting Company from Washington, D. C. [May 10, 1931]; Flag day, broadcast from Betsy Ross House, Philadelphia, by Columbia Broadcasting Company and associated stations [June 14, 1931]; Independence day, broadcast from Independence Hall, Philadelphia, by National Broadcasting Company chain of stations [July 4, 1931].