ผู้เขียน: Richard J. Hardy

Jeremy G. Venditti, Assistant Professor, Simon Fraser University, Department of Geography, Burnaby, British Columbia, Canada. James L. Best, Threet Professor, Departments of Geology and Geography, University of Illinois, Urbana, IL, USA. Michael Church, Professor emeritus, Department of Geography, The University of British Columbia, Vancouver, British Columbia, Canada. Richard J. Hardy, Lecturer, Department of Geography, Durham University, UK.