L'indispensabile : a complete modern school for the flute : 101 exercises, preludes, etc., for daily practice = Scuola moderna di perfezionamento per flauto : 101 esercizi e preludi giornalieri

Leonardo De Lorenzo was an Italian virtuoso flautist and music educator. He served as the principal flautist at the New York Philharmonic under Gustav Mahler. Included among his pupils at the Eastman School of Music was the flautist Julius Baker.