Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Concone, Giuseppe",Thirty daily exrecises for the voice : op. 11 : These exercices form a transition from the Grand style to the extreme difficulties of vocalisation,,G. Schirmer,1898,Schirmer's library of musical classics,,,,https://cir.nii.ac.jp/crid/1130000797562329088