Water Pollution Control Federation -Washington, DC, US,
Simplified laboratory procedures for wastewater examination, 3rd, rev.ed.ª ed. Washington, DC, USA: Water Pollution Control Federation, 1985, p. xi, 105 p.: fig., tab., drwngs., photogr.
P. A. Weem,
«Testing of solar pumpsets». Twente University of Technology, Technology and Development Group, Enschede, The Netherlands, p. 34 p.: fig., tab., 1985.
I. D. Yayasan Di Yogyakarta,
«Water purification with Moringa seeds»,
Waterlines, an international journal of water, sanitation and waste, pp. p. 22-23: ill., 1985.