[Below: An important book on understanding the 'Sudetenland Crisis', entitled 'Von der SDP zur NSDAP - Ein dokumentarischer Bildbericht' (From the SDP to the NSDAP - A Documentary Pictorial Report), 120pgs, (c)1939. The initials 'SDP' stand for the 'Sudetendeutsche Partei' (The Sudeten German Party), created by the tireless National Socialist fighter Konrad Henlein.]