"Friedrich Ludwig" . . . "1851"^^ . . _:Bdcba462cc71e226081a506c571c77a21 . "Ludwig, Friedrich (1851- ; bioloog)" . "Friedrich" . . "Ludwig" . _:Bdcba462cc71e226081a506c571c77a21 . _:Bdcba462cc71e226081a506c571c77a21 . _:Bdcba462cc71e226081a506c571c77a21 "2023-05-19"^^ . _:Bdcba462cc71e226081a506c571c77a21 . _:Bdcba462cc71e226081a506c571c77a21 . _:Bdcba462cc71e226081a506c571c77a21 "143299018" . _:Bdcba462cc71e226081a506c571c77a21 . _:Bdcba462cc71e226081a506c571c77a21 . _:Bdcba462cc71e226081a506c571c77a21 .