Leipzig: Steingräber Verlag, n.d.(ca.1910).
Unidentified publisher, n.d.(ca.(1990s?)). (reprinted with computer-typeset footer and header added and plate information removed.)
Public Domain [tag/del]
||30 Studies for Flute Solo
||30 Capricen : ein "Gradus ad Parnassum" der modernen Technik für Flöte allein ... : a "Gradus ad Parnassum" of the modern technique for flute solo.
the several-times-removed score says studies, and so possibly may have said some of the first editions; however, the 1919 edition said caprices (which is also how it's usually referred to in "the literature").