Some studies composed by
Gustave Lazard
(Germany-Aachen, 7.12.1875 - 30-11-1948 France-Paris)
He is the older brother of the more productive Lazard, Frédéric 1883-1948
More about Gustave at Heritage des Eches Francais
Wikipedia has other data about birth-date and birth-place.
(All his studies, more exact dates, possible corrections or cooks and exact details about sources can be found in the
Harold van der Heijden (HHdbVI))