. . . "Propp" . "William H. C. Propp"@pl-PL . "1957-12-26" . "William Henry C. Propp" . . . "William H." . "H." . "William H.C." . . "Henry"@en . "William H.C. Propp" . . "Propp"@fr-FR . . "William Henry Covici Propp"@de-DE . . . "H. C." . "Henry Covici" . . "William H. C. Propp" . "William H. PROPP" . "PROPP" . . "William Henry Covici Propp" . "Propp"@en . "Propp, William Henry (William Henry Covici)" . . "William H.C Propp" . "William Henry Propp"@en . "William H. Propp" . "Henry C." . . . "H.C" . "William H. Propp" . . "William"@en .