_:Ba93ca21d1f1d143be6a3161f5da530b6 . . "1956"^^ . . . . "Léon Vallas" . "Vallas" . "1879"^^ . "Léon" . "Vallas, Léon (1879-1956)" . _:Ba93ca21d1f1d143be6a3161f5da530b6 . _:Ba93ca21d1f1d143be6a3161f5da530b6 . _:Ba93ca21d1f1d143be6a3161f5da530b6 "2023-05-21"^^ . _:Ba93ca21d1f1d143be6a3161f5da530b6 . _:Ba93ca21d1f1d143be6a3161f5da530b6 . _:Ba93ca21d1f1d143be6a3161f5da530b6 "072500514" . _:Ba93ca21d1f1d143be6a3161f5da530b6 . _:Ba93ca21d1f1d143be6a3161f5da530b6 . _:Ba93ca21d1f1d143be6a3161f5da530b6 .