Statistics: works by Ellington 
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Statistics > Composers > United States > Ellington, Duke
Permalink: operabase.com/visual.cgi?season=2016&is=opera&by=Ellington
From the composers database ...
Ellington, Duke(1899–1974)
American composer, pianist and bandleader.
compositeur, pianiste et bandleader américain.
compositore, pianista e bandleader americano.
amerikanischer Komponist, Pianist und bandleader.
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 Ellington (2012/17)
"Performance runs over the five seasons, 2012/13 to 2016/17" Can't read stats1217_workprod.csv ... aborting