Trouble Page. WGA? Kurt Weill composed, never wrote libretto.

This is not Opera.
Kurt Weill never credited writer section.

THE THREEPENNY OPERA
Based on Bertolt Brecht and Kurt Weill

And they credited again

Music by Kurt Weill
From the original lyrics by Bertolt Brecht

Based on doesn't mean Kurt Weill wrote libretto. And not used Brecht libretto.
Because English adaptation and arrangement.

And STOP to use word "Opera" to "Writers" section anymore. That's really idiot thing to do.

PS: Terrbile this happened. This site finally locked for WGA. And keeps incorect and uncredited information here.