"Propp, William Henry" . . _:Ba5ecfb54a046bcc4bb69805df9a034a9 . "Propp, William Henry Covici" . "William Henry Propp" . "William Henry" . "Propp, William H.C." . . . "Propp" . _:Ba5ecfb54a046bcc4bb69805df9a034a9 . _:Ba5ecfb54a046bcc4bb69805df9a034a9 . _:Ba5ecfb54a046bcc4bb69805df9a034a9 "2023-05-20"^^ . _:Ba5ecfb54a046bcc4bb69805df9a034a9 . _:Ba5ecfb54a046bcc4bb69805df9a034a9 . _:Ba5ecfb54a046bcc4bb69805df9a034a9 "074403575" . _:Ba5ecfb54a046bcc4bb69805df9a034a9 . _:Ba5ecfb54a046bcc4bb69805df9a034a9 . _:Ba5ecfb54a046bcc4bb69805df9a034a9 .