[Oberon] Re (2): Attribution of graphics.

[peter at easthope.ca]

From:	peter at easthope.ca
Date:	Mon, 18 Jul 2022 13:27:20 -0700
> The arrow isn't changing.  The copyright on the arrow, belonging to 
> Professors Wirth and Gutknecht, continues indefinitely? 

I don't see the arrow in the screen shots in the Lilith Handbook, 1982. 
According to 
https://commons.wikimedia.org/wiki/File:Oberon_genealogy.svg 
it appeared first in 1985 in Oberon. Correct?

Thx,                 ... P.L.