Air operations in stalingrad / kuban

[Alfaunostebas11]

In order to enrich historical knowledge and to be able to create realistic missions, I ask you if you are able to show me articles, books or other publications concerning a detailed description of the air operations that took place in the battle of Stalingrad 1942 and in Kuban 1943.
Order of battle, operations diary, units involved, names of pilots, losses etcetera ... both for the Luftwaffe and for the VVS.
Of course I am aware of the existence of books, but I specify that I am talking about resources freely available on the web and not of books to buy ...
Thanks, Stebas.

[Alfaunostebas11]

I have found two interesting titles:

- Black cross red star vol 3

- Fighters over Stalingrad

Does anyone know if these books are available to download in pdf? or to be read directly on the screen ?

Thank