by Helmut Tributsch ; translated by Miriam Varon. Helmut Kratzsch ; translated by R.F.S. Fleming. by Wu Minxian ; translated by Li Xiaona. by Miguel de Cervantes ; translated by Thomas Shelton. by Heinz Hossdorf ; translated by C. Van Amerongen. by Felix Klein ; translated by M. Ackerman. by Haiping Qiu ; translated by Xiaoli Jiang.