_:vb4742338 "citation abr\u00E9g\u00E9e utilis\u00E9e \u00E0 la BnF"@fr . _:vb4742338 "Helm, C.P.E. Bach" . _:vb4742338 . _:vb4742338 "abbreviated citation used at the BnF"@en . _:vb4742338 .