Méthode élémentaire et pratique (Philipp, Isidor)
It is unlikely that this work is public domain in the EU, or in any country where the copyright term is life-plus-70 years. However, it is in the public domain in Canada (where IMSLP is hosted) and other countries where the term is life-plus-50 years (like China, Japan, Korea and many others worldwide). As this work was first published before 1923 or failed to meet notice or renewal requirements to secure statutory copyright, it is very likely to be public domain in the USA as well.
Paris: Durand, 1895. Plate D. & F. 5004.
1895 may be the copyright date of the first edition (and édition might mean "printing" rather than edition? There's no hint of a 2nd edition in any source online, anyway, at least not under the same title.)
|Work Title||Méthode élémentaire et pratique|
|First Publication||1895 or earlier|
Also contains in addition to studies, a collection of works for or arranged for 2 pianos (student and teacher) by e.g. Steibelt, Beethoven, Schumann, Mendelssohn, Haydn and others.