. . "Thorburn"@en . . "D." . . "Thorburn"@fr-FR . . . "David Ph. D. Thorburn" . "David"@en . . . "Thorburn, David, Ph. D." . "David Thorburn"@cs-CZ . . . "Ph. D." . . . . "Ph. D. David Thorburn"@en . "D. Thorburn"@nl-NL . "1900" . . . .