por Waterborne Diseases In The United States [Ed. Counther F. Craun] | Craun, Gunther F [editor].
por Mc Junkin, F. Eugene [autor] | Cruz Quevedo, Edward [traductor] | Estados Unidos. Agency for International Development | National Demostration Water Project (e. U. ) | Oficina Sanitaria Panamericana.
por Hunter, Paul R [editor] | Ronchi, Elettra [editor] | Waite, Mike [editor] | Organisation for Economic Co-operation and Development Development.