. "Robert C. Roberts"@de-DE . "Robert C. Roberts" . . . "Robert Campbell" . "Roberts"@fr-FR . . "Robert Roberts" . . "Roberts"@en . "Robert C." . "1942" . . "Robert"@en . . . "Roberts, Robert C. (Robert Campbell)" . . "C." . "Robert Campbell Roberts" . "Campbell"@en . . . . "Robert Campbell Roberts"@en . . . .