_:Bc5c4b049eefeb0e29377b5b60123f21d . _:Bc5c4b049eefeb0e29377b5b60123f21d . _:Bc5c4b049eefeb0e29377b5b60123f21d "2023-05-22"^^ . _:Bc5c4b049eefeb0e29377b5b60123f21d . _:Bc5c4b049eefeb0e29377b5b60123f21d . _:Bc5c4b049eefeb0e29377b5b60123f21d "068460139" . _:Bc5c4b049eefeb0e29377b5b60123f21d . _:Bc5c4b049eefeb0e29377b5b60123f21d . _:Bc5c4b049eefeb0e29377b5b60123f21d . . "Robert L." . _:Bc5c4b049eefeb0e29377b5b60123f21d . "Wilken, Robert L. (1936-)" . "Robert L. Wilken" . . "Wilken" . . "Wilken, Robert Louis" . "1936"^^ .