Thanks Dan. I assumed that's who it was, but it appears to be unattributed and my german's no good for telling me otherwise. I think I'll assume it's Kapr's.
Hildegard Korger "Schrift und Schreiben" (1977) p. 80-81 has very similar, but diffirent drawing (Studie der Autorin), so this one could be prof. Kapr's.
Captured from commoncrawl.org on 19 Apr 2015. original URL