_:Bda37a90abb1a68e3fc5f231d089fb742 . "Christopher G." . "Langton" . "Christopher G. Langton" . . . . "Langton, Christopher G." . . _:Bda37a90abb1a68e3fc5f231d089fb742 . _:Bda37a90abb1a68e3fc5f231d089fb742 . _:Bda37a90abb1a68e3fc5f231d089fb742 "2023-05-20"^^ . _:Bda37a90abb1a68e3fc5f231d089fb742 . _:Bda37a90abb1a68e3fc5f231d089fb742 . _:Bda37a90abb1a68e3fc5f231d089fb742 "074774093" . _:Bda37a90abb1a68e3fc5f231d089fb742 . _:Bda37a90abb1a68e3fc5f231d089fb742 . _:Bda37a90abb1a68e3fc5f231d089fb742 .