found: Work cat.: Gander, T.J. PzKpfw I & II, 2006:p. 6 (The Blitzkrieg campaigns of 1939 and 1940 were largely carried out by the little PzKpfw I and the only slightly larger PzKpfw II, the modest forerunners of what were to become Germany's spearhead land weapon, the Panzer divisions) cover (PanzerKampfwagen I & II) back cover (Panzer I)
found: Panzerkampfwagen I to IV WWW site, June 2, 2006(In the 30s the Panzerkampfwagen I was built.)
found: Wikipedia WWW site, June 2, 2006:Panzer I (The Panzer I went by many names and designations, with the most common official designation as the Panzerkampfwagen I, or PzKpfw I.)
