. . "Kl." . "K." . "C. R.. De Klerk" . "R de" . "De Klerk" . "C. R. de K" . "Cornelis R. de Klerk" . "R., De" . "Kl" . . "C. R. de Klerk" . "Cornelis R. de KLERK" . "1873" . "de Cornelis R. Klerk" . "R.. De" . "R. de" . "Klerk, C.R. de (Cornelis R.)" . "R."@en . "C." . . . "R. De" . "C.R. de" . "C.R. de Kl." . . . "C. R. Klerk"@en . "KLERK" . "Cornelis"@en . "Cornelis R de Klerk" . "de" . "C. R. De Klerk" . "C.R de Klerk" . "C. R. ˜deœ K." . "C.R.de" . "Cornelis R., De Klerk" . "C.R.de Klerk" . "C.R. de K." . "Klerk, Cornelis R. de" . "C. R. de Klerk" . "Klerk, C. R. (Cornelis R.)" . "C. R. De Klerk" . . "C.R. de Kl" . "C. R. de K." . "K" . . "C. R." . "C.R" . "Klerk"@en . "Cornelis R. ˜deœ Klerk"@de-DE . "C. R. ˜deœ Klerk" . "1953" . "Cornelis R. Klerk"@en . . "C.R. de K" . "C.R. de Klerk"@nl-NL . "Cornelis R. de Klerk"@fr-FR . "Klerk, C. R. de (Cornelis R.)" .