_:B639e2da4313f415b4a8f1e84052c6826 . "Gerhard" . "Siegel" . "Gerhard Siegel" . . . . "Siegel, Gerhard" . . _:B639e2da4313f415b4a8f1e84052c6826 . _:B639e2da4313f415b4a8f1e84052c6826 . _:B639e2da4313f415b4a8f1e84052c6826 "2023-05-20"^^ . _:B639e2da4313f415b4a8f1e84052c6826 . _:B639e2da4313f415b4a8f1e84052c6826 . _:B639e2da4313f415b4a8f1e84052c6826 "072994932" . _:B639e2da4313f415b4a8f1e84052c6826 . _:B639e2da4313f415b4a8f1e84052c6826 . _:B639e2da4313f415b4a8f1e84052c6826 .