"1970"^^ . . _:B727181c3e7f953639b2acb028809cf84 . "Alexander Sperber" . "Sperber" . "Sperber, Alexander (1897-1970)" . . "Alexander" . . . "1897"^^ . _:B727181c3e7f953639b2acb028809cf84 . _:B727181c3e7f953639b2acb028809cf84 . _:B727181c3e7f953639b2acb028809cf84 "2021-09-28"^^ . _:B727181c3e7f953639b2acb028809cf84 . _:B727181c3e7f953639b2acb028809cf84 . _:B727181c3e7f953639b2acb028809cf84 "067501486" . _:B727181c3e7f953639b2acb028809cf84 . _:B727181c3e7f953639b2acb028809cf84 . _:B727181c3e7f953639b2acb028809cf84 .