Piero Pierotic, Baritone Entered from booking ledger and New York Times concert listing and review. The Grieg songs are listed in their German settings. "CONCERT AND OPERA PROGRAMS FOR THE WEEK." New York Times (1923-Current file), Feb 17 1957, p. 1. ProQuest. Web. 11 May 2021. "Piero Pierotic, Baritone, Sings." New York Times (1923-Current file), Feb 22 1957, p. 25. ProQuest. Web. 12 May 2021. solo recital 1957-02-21T20:30:00