Thank you Kathy, for this explanation. I can stop looking for references
and put this in my notebook, instead. :-)
You made it so clear; I feel very privileged to have the opportunity to be in
touch with real knowledgeable people. At the other hand I do not feel well under
the idea that I have been passing on incorrect or not quite-correct information
al this time.

Gonneke van Veldhuizen

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