Amtliches Unterrichtsbuch über Erste Hilfe. By Dr Richard Krueger. 1942 Smaller Edition. This specific book saw continuous Medical Reference post World War Two at the Red Cross Institute in Württemberg noted by the Ex-Libris Stamp “Rotes Kreuz Württemberg-Hohenzollern e.V. Kreisverein Calw Bereltschaft (m) Neuenbürg/Wttbg.” On the Title Page.