'German Headgear in World War II: A Photographic Study of German Hats and Helmets'
This two volume set by Pat Moran and Jon Maguire illustrates, in full color, over 240 visor hats and helmets of the German: Army, Luftwaffe, Kriegsmarine, SS, NSDAP, Police, Civilian, and miscellaneous formations. Each peaked hat is shown from four angles