P. Mungarndee, Hovicitir, P., et Wirojanagud, W.,
« Evaluation of rainwater quality : heavy metals and pathogens », in
Proceedings of the Fourth International Conference on Rain Water Cistern Systems : 2-4 August 1989, Manila, Philippines, 1989, p. P. E5-1 - E520 : 4 fig., 6 tab.
G. Michaelides,
« Investigations into the quality of roof-harvested rain water for domestic use in developing countries », in
Proceedings of the Fourth International Conference on Rain Water Cistern Systems : 2-4 August 1989, Manila, Philippines, 1989, p. P. E3-1 - E3-12 : 3 fig.
D. Holmes,
« Rainwater harvesting for potable water in the Eastern Llanos of Venezuela », in
Proceedings of the Fourth International Conference on Rain Water Cistern Systems : 2-4 August 1989, Manila, Philippines, 1989, p. P. J1-1 - J1-10 : 3 fig., 3 tab.
A. Owoade,
« Rainwater harvesting in Nigeria », in
Water, engineering and development in Africa : proceedings of the 15th WEDC Conference, Kano, Nigeria, 3-7 April 1989, 1989, p. P. 129-131: fig., tab.
M. I. Yaziz, Gunting, H., Sapari, N., et Ghazali, A. W.,
« Variations in rainwater quality from roof catchments »,
Water research, p. p. 761-765: fig., tab., 1989.