There are many internet sources for these flash voltages. I didn't trust them because I have no idea how they were measured. I guess most everybody uses digital VOM nowadays.... I still like (and only have) analog ones here.
That's not a reliable method though. The Avo 7 meter I inherited from my grandfather has a low enough internal resistance to trigger any flash which I try to neasure with it.
"People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.