When I read LD's post several days ago, I did a Google search and came up with this information;
I passed this on to Larry via P/M but thought to include it here.
I can only convey my condolences belatedly to Petr and Rada. May your dad rest in peace. He was a good guy.
PS; this post is in response to LD's post below regarding the passing of Boris Plesinger MK