. "Oskar Boettger" . "Boettger's" . "Boettger O" . . . "1844" . "Oskar Boettger" . . . "O. Boettger" . "B\u00F6ttger" . . . "Boettger" . . . . . . . . . . . . . . . . . "1910" . . . . . . . . . . . "B\u00F6ttger [sic], Oskar" . . "BOETTGER" . . . "1844-03-31" . . "Boettger, Oskar" . . . . "Boettger, O." . . . . "Boettger, O[skar]" . "B\u00F6ttger O" . . . .