edited by K. Gessner, Geological Survey of Western Australia, Australia, T.G. Blenkinsop, Cardiff University, UK, and P. Sorjonen-Ward, Geological Survey of Finland, Finland
edited by J. Halla, University of Helsinki, Finland, M.J. Whitehouse, Swedish Museum of Natural History, Sweden, T. Ahmad, Jamia Millia Islamia, India, and Z. Bagai, University of Botswana, Botswana