Pawel,
I have the issue(s) you are looking for.
Please contact me off line.
gawebster@earthlink.net
Luftahrt International was published as a smaller magazine by a different publisher (Mittler I believe) after the first 27 were published by Pawel.
They ran as a monthly until 1983.
Kossler's articles on the Do-17 ran in Issues 1, 2 and 3 in 1983.
Gary