. . . "Augustus Elizabeth Maria" . "P.A.E.M Janssen" . "JANSSEN" . "Janssen, P.A.E.M. (Petrus Augustus Elizabeth Maria)" . "Janssen, P. A. E. M. (Petrus Augustus Elizabeth Maria)" . "P.A.E.M" . "P." . "Petrus" . "A. E. M." . "P.A.E.M JANSSEN" . "P.A.E.M. Janssen"@en . "1951" . . "P. A. E. M. Janssen" . "Petrus Augustus Elizabeth Maria Janssen" . "A." . "Petrus A. Janssen" . . "Janssen" . .