This very thorough report of Joe's death on March 3, 1968 in Monte Carlo by the U.S. State Dept. consul in Nice was sent both to Hilda Liebman and Arnaud Clerc. I somehow overlooked it on earlier Ancestry searches, but found it there on Monday morning when going back to collect the documents.
Since it is hard to read I will summarize: He died at 11 pm on March 3, 1968 of myocardial infarction (heart attack) at the Hotel de Paris in Monte Carlo in the Principality of Monaco. He was 76 years old, retired, a naturalized American citizen. His remains have been air-shipped to Paris for interment in the Pantin Parisian Cemetery. His effects are in the custody of his widow Hilda Liebman, and she is responsible for the custody and accounting of those effects. Copies of the report sent to Hilda Liebman at the Hotel de Paris, Monte Carlo, and Arnaud Clerc, 37 Av. Victor Hugo, Paris.