Posted by Lennart Bendixen on 16-06-2015 15:33
#5
Thank you very much for the links! Of course I'm interested, so I'll check them out. There's only a time problem, but who hasn't got that.... and in fact there's no need to hurry :)
Isn't "De Nederlandse zweefvliegen" the more suitable book for Northern Germany? It seems to be more complete.