K. G. Villholth,
“Cleaning wells after seawater flooding”, vol. no. 15. World Health Organization (WHO), Geneva, Switzerland, p. 4 p. : 3 boxes. 6 fig., 2011.
WHO -Geneva, CH, World Health Organization,
“Safe drinking-water from desalination”. World Health Organization (WHO), Geneva, Switzerland, p. iv, 28 p. : 1 fig., 3 tab., 2011.