of fully tracked and self-propelled artillery. There became a need for fully tracked
armoured observation vehicle (Beobachtung Fahrzeuge), which allowed the artillery
commander to go further forward and be able to give orders direct to artillery
units further back, These Artillerie Panzerbeobachtungwagen had extra radios fitted.
Armoured Fighting Vehicles
of Germany World War II.
Encyclopedia of German
Tanks of World Two.
For a complete list of sources