I'm looking for reliable, verifiable, solid information. If you don't have it, that's no problem. No one knows everything. I certainly don't, and that's why I'm asking. There's no need to reply if you don't have the answer the meets the needed specifications for rigor. I have no interest in offending anyone, really.
Then should list the thing that you looked. No one know that you all ready looked at Wikipedia. -- Caddy