Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Beethoven, Ludwig van and Frohlich, Martha","Piano sonata op. 28 : facsimile of the autograph, the sketches, and the first edition",,Beethoven-Haus,1996,Veröffentlichungen des Beethovenhauses in Bonn,,3881880089,,https://cir.nii.ac.jp/crid/1130282269744791296