contribute by Samone Bos ... [el al.] contributors, Samone Bos ...[et al.] contributions by Simon Castets ... [et al.] contributed by Claude D'Anthenaise... [et al.] contributions by Barry Friedman ... [et al.] contributions by Isabelle Dervaux ...[et al.] contributions by George Hargreaves ... [et al.] with contributions by Brooks Adams ... [et al.] contributions by Vivienne Becker ...[et al.] contributions from Ann Dinsdale ... [et al.]