Maciej,
Many Souffan forgot to say that a very excellent book on n°340 published recently.
Its title is "Le Groupe de Chasse Ile de France 1941-1945, n°340 sqdn". The author is Frederic Bruyelle.
Feedback and details here :
http://aerostories.celeonet.fr/~aero...ticle2869.html
There are prints of a/c of de Labouchère and a profile
I am afraid it is hard to find this one in Poland but feel free to contact me off-board.
Bertrand