Hello Dr. Haan,
I thought you would be interested in the attached Boelkow Junior article that appeared in the August/September 1964 issue of Air Progress Magazine.
The file Bolk01 is page 1 and Bolk02 is page 2 and so on.

I hope you find it interesting.

Jim Washburn
Cochran, Georgia, USA
N412GS
S/N 620