Small community water supplies : technology of small water supply systems in developing countries / [ed. by E.H. Hofkes ; prepared with contributions from and under the joint supervision of L. Huisman ... et al.]Stromingsweerstanden in buisleidingen / samengest. door L. HuismanSmall community water supplies : technology of small water supply systems in developing countries / prepared with contrib. from and under the joint supervision of L. Huisman ... [et al.] ; comp. and ed. by E.H. Hofkes