Here are links to a 2 part-PDF of the Roger-Ducasse catalogue of works, since it doesn't seem to appear in the composers' catalogues index.
https://www.dropbox.com/s/ond4ke5s2cgs6mi/Catalogue%20Roger-Ducasse%201.pdf?dl=0
(https://www.dropbox.com/s/ond4ke5s2cgs6mi/Catalogue%20Roger-Ducasse%201.pdf?dl=0)
https://www.dropbox.com/s/bietjsvhtjn4gr9/Catalogue%20Roger-Ducasse%202.pdf?dl=0 (https://www.dropbox.com/s/bietjsvhtjn4gr9/Catalogue%20Roger-Ducasse%202.pdf?dl=0)