The assault
gun (Sturmgeschütze) was designed to provide advancing infantry with close
armoured artillery support, the assault gun's job was to take out fortified positions
and to deal with enemy tanks over time the assault gun was continually up gunned
and became a very effective tank killer
Gallery: Sources: German Military Vehicles.
ISBN-10: 087349783X
Armoured Fighting Vehicles of Germany World War II.
ISBN-10: 0214203077
Encyclopedia of German Tanks of World Two.
ISBN-10:
1854095188
For a complete list of
sources 
