co-editors, Ralf Vanselow ... [and others] Editors, Walter A. Backofen [and others] Contributors, Walter Prichard Eaton [and others] Contributors: T.E. Ivall [and others] Edited by Silvano Bonotto [and others] Editors: J. M. Greep [and others] Editors: M.W. Thring [and others] contributors: J. Brozek [and others]