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M. Favin,
Health education. Washington, DC, USA: World Federation of Public Health Associations, 1986, p. 80 p.: fig.
S. Laver,
«Raising water with different pumps : the Zimbabwe Blair pump», vol. no. 2. Blair Research Laboratory, Harare, Zimbabwe, p. 13 p.: fig., 1986.
S. Laver,
«Raising water with different pumps : the Zimbabwe bucket pump», vol. no. 1. Blair Research Laboratory, Harare, Zimbabwe, p. 8 p.: fig., 1986.