Kratz, Rene Fester, Siegfried, Donna Rae (2) Moore, John T. (stephen F. Austin State University, Langley, Richard H. (stephen F. Austin State University (1) Maclaren, Donald (liverpool John Moores University, Morton, James (liverpool John Moores University (1) Krauss, Gerhard (university Of Bayreuth (1) Voet, Donald (university Of Pennsylvania), Voet, Judith G. (swarthmore College) (1)