I have tried my best to ask for permission to use pictures and scans. However many come from private collections and unknown sources. It is nearly impossible for me to find out who owns the copyright for those. As there is no commercial interest at all involved I am confident that the usage of those pictures in low resolution will harm no one.
But if you own the copyright of one of those pictures please contact me and I will gladly add a note. If you want the picture in question removed I will do so immediately.