within the Panzergrenadier regiments, inside Panzer and Panzergrenadier Divisions, in their heavy infantry gun units. Each detachment had six available. Surviving vehicles A "Grille" Ausf. K is in storage at the U.S. Army Artillery Museum at Fort Sill, USA. A Munitionspanzer 38(t) is on display at the U.S. Army Artillery Museum at Fort Sill, USA. References Bibliography Chamberlain, Peter, and Hilary L. Doyle. Thomas L. Jentz (Technical Editor). Encyclopedia of German Tanks of World War Two: A Complete Illustrated Directory of German Battle Tanks, Armoured Cars, Self-propelled Guns, and Semi-tracked Vehicles, 1933–1945. London: Arms and Armour Press, 1978 (revised edition 1993). ; rev. ed. . Further reading Trewhitt Philip, 1999, Armoured Fighting Vehicles, p 104 External links World War II Vehicles Gw. für 15 cm s.I.G. 33/1 (Sd. Kfz. 138/1): S.P. Heavy Infantry Howitzer (on Czech Chassis) (Catalogue of Enemy Ordnance, 1945) World War II self-propelled artillery of Germany 150 mm artillery Military vehicles introduced from 1940 to 1944