Entered from program calendar and New York Times concert listing and review. "Concert And Opera Programs Of The Week." New York Times (1923-Current file): 1. Apr 11 1954. ProQuest. Web. 4 Nov. 2014. "Miss Lambert, Soprano, Heard." New York Times (1923-Current file): 24. Apr 12 1954. ProQuest. Web. 4 Nov. 2014.