should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Bauern_ABC_(IA_bauernabc00pocc_0).pdf...
should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Bauern_ABC_(IA_bauernabc00pocc_1).pdf...