Operation Barbarossa: The Complete Organisational and Statistical Analysis, and Military Simulation Volume IIA

This is an excellent review of the weapons and TO&E of the Germany Army during Operation Barbarossa.  The first part of the book describes the development, characteristics, and deployment of all major German weapons systems, from rifles to bomber aircraft, while the second (larger) part of the book dives deep into the TO&E of the multitude of German unit types, including differences between the various "waves" of infantry divisions, differences between divisions and separate brigades, etc.).  An essential resource for anyone needing detailed info about German TO&E during Operation Barbarossa.