Statistics: works by Gruenberg 
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Statistics > Composers > United States > Gruenberg, Louis
Permalink: operabase.com/visual.cgi?season=2016&is=opera&by=Gruenberg
From the composers database ...
Gruenberg, Louis(1884–1964)
Russian-born American composer.
compositeur américain de la naissance russe.
compositore americano, russo di nascita.
amerikanischer Komponist, in (ru) geboren.
From New & Rare 2016/17 ...
"Lyric works designed for staging and classically trained voices, 1 Sep 2016-31 Aug 2017"
"Rare? typically fewer than 13 performance runs in the 5 seasons"
No entry found for this time period
From New & Rare 2017/18 ...
"Lyric works designed for staging and classically trained voices, 1 Sep 2017-31 Aug 2018"
"Rare? typically fewer than 13 performance runs in the 5 seasons"
No entry found for this time period
From the statistics ... works by Gruenberg (2012/17)
"Performance runs over the five seasons, 2012/13 to 2016/17" Can't read stats1217_workprod.csv ... aborting