Laboratory and field testing of handpumps
Yau, Goh Sing
Laboratory and field testing of handpumps by Goh Sing Yau - Ottawa International Development Research Centre 1985 - 138 p. - No. TS 51e IDRC .
Handpumps
621.65.001.5 / Y35L
Laboratory and field testing of handpumps by Goh Sing Yau - Ottawa International Development Research Centre 1985 - 138 p. - No. TS 51e IDRC .
Handpumps
621.65.001.5 / Y35L