Stockholm Environment Institute -Stockholm, SE, SEI y Stockholm International Water Institute -Stockholm, SE, SIWI,
«Proceedings Mar del Plata 20 year anniversary seminar : water for the next 30 years, averting the looming water crisis, Stockholm, August 16, 1997», vol. no. 1
no. 1. Stockholm International Water Institute (SIWI), Stockholm, Sweden, p. 131 p. : fig., 1997.