The Cover features the logos of American Crystallographic Assn, Assn Française de Cristallographie, Assn Italiana Cristallografia, British Crystallographic Assn, Crystallographic Soc. of Japan, Czech and Slovak Crystallographic Assn, German Assn for Kristallographie, Dutch Assn for Crystallography, Egyptian Soc. of Crystallography, European Crystallographic Assn, Soc. of Crystallographers in Australia and New Zealand, Spanish Group of Crystallography, and Swiss Soc. for Crystallography.