Eberhard Zeidler ; translated by Leo F. Boron. Eberhard Zeidler ; translated by Leo F. Boront. Eberhard Zeidler ; translated by Peter R. Wadsack. Eberhard Zeidler ; translated by Author and by Leo F. Boront. Eberhard Zeidler ; translated by Juergen Quandt. Eberhard Zeidler ; translated by the author and by Leo F. Boront. Gerard Hegron ; translated by David Beeson. by Theodor Schmelcher ; translated by Les. J. Croyston. Edouard Leve ; translated by Jan Steyn. selected & translated by R. K. Gordon.