Here are a couple of Hitler Youth songbooks with loose pages. The covers say Liederblatt der Hitler Jugend "auf Fahrt" (To Ride) nr. 58 and Liederblatt der Hitler Jugend "Jenseits der Grenzen" (Beyond the Limits) nr. 59.
I received all of these at once and am not certain which sheet music goes with which cover. They are being all sold together so you can figure it out! :)