Actually, they RT from my twitter acount ^^
They were 8,000 in the stands (Stade Pershing, Paris), and the pitch was frozen.
The picture came from press reports that you cand find plenty here: (from 1933 up to the late 40's)
http://gallica.bnf.fr/
https://www.retronews.fr/ (much more user friendly)
There is a load of fantastic stuff to dig out. For exemple: Galia proposing allready in 1934 to hold a World Cup, a "group of italians" asking to hold a game in Roma, etc.