d'après Anton Fürstenau-Written by the French flautist and composer Marcel Moyse this is a set of studies and exercises on keys for advanced players as it is considered as quite difficult. It would definitely complete the series of work by Marcel Moyse also published by Alphonse Leduc such as 'Gammes et Arp?ges' (1933) 'De la Sonorit?' (1934) and 'M?canisme-Chromatisme' (1927) among others. Considered as a maestro by some musicians Marcel Moyse (1889-1984) has written various Flute studies and exercises books that comprises an excellent method for all levels.