Long Range Reccon over Russia before 22VI41

[Mirek Wawrzynski]

Hi
I wonder if there is any "a book" or article edited in the last 10-20 years or more about German long range reccon mission done over Russia before 22 VI 1941.

In general the units name (Sondernkommando Rowehl - Aufkl. Gr./Ob.d.L), the unit planes: Ju 86 P, Ju 88 B-0), some mission, the airfileds from the crews took off for this operations are more or less know, but maybe there is more information about this kind of spy operations over Russia?

Regards,
MirekW