OMS. (1994). Operation and maintenance of urban water supply and sanitation systems: A guide for managers. Geneva: OMS.
Trích dẫn kiểu ChicagoOMS. Operation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide for Managers. Geneva: OMS, 1994.
MLA citiranjeOMS. Operation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide for Managers. Geneva: OMS, 1994.
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