[name missing]
Stephen Devereux
S. Schwartz
G.J. Ebrahim
Kenneth Walsh
Who Study Group On Technology for Water
Michael Hawley
Joe Carr
Unknown Author
Caroline Pratt
Jacques Vallin
Maurice H. King
Pay Drechsel
Yvonne Lefèber
Jeremy Holland
Ruth Binney
Ted Lankester
Leila Stott
Peter G. Smith