== 1937 Cigna / Gui == 

 The listed source and my CDs give 'Coro e orchestra dell'EIAR di Torino' - not Teatro Regio which burned down the year before and was not rebuilt until 1973(?).  I have made this edit. 

 My CDs are Lyrica LRC 01091 and Frequenz 043-025 in the series 'Le Grandi Opere Liriche'