ed. by Marvin J. Weber. ed. by William H. Beyer. ed. by Walter J. Hamer. ed. by Alvin A. Iverson. ed. by Karl-Heinz Schriever. ed. by Edward R. Comer. ed. by Ronald S. Bauer. ed. by K. W. Boer. ed. by T.Kevin O'Brien. ed. by Hugo M. Ortner.