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«Caretaker manual for rural water supplies». Lesotho, Ministry of Cooperatives and Rural Development, Village Water Supply Section, Maseru, Lesotho, p. 27 p.: fig., 1986.
E. E. N. Nyangeri,
«Rehabilitation of hand-dug wells and protected springs in Kisii, Kenya», vol. no. 29. Tampere University of Technology, Tampere, Finland, p. 110 p.: fig., tab., 1986.