Helvetas
Manual for rural water supply with many detailed constructional scale-drawings - 1st ed. - London Swiss Center for Appropriate Technology 1980 - 175p. ill.
Water supply : Engineering
628.7202 / HEL/1980
Manual for rural water supply with many detailed constructional scale-drawings - 1st ed. - London Swiss Center for Appropriate Technology 1980 - 175p. ill.
Water supply : Engineering
628.7202 / HEL/1980