Statistics: works by Ruiz 
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Statistics > Composers > Venezuela > Living > Ruiz, Federico
Permalink: operabase.com/visual.cgi?season=2016&is=opera&by=Ruiz
From the composers database ...
Ruiz, Federico(b.1948)
http://masterfruiz.blogspot.co.uk (other)
  (no contact information on file)
Venezuelan composer.
compositeur vénézuélien.
compositore venezuelano.
venezuelanischer Komponist.
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 Ruiz (2012/17)
"Performance runs over the five seasons, 2012/13 to 2016/17" Can't read stats1217_workprod.csv ... aborting