Biblio

T. Keating y Lawson, R., «Water efficiency of retrofit dual flush toilets». Environment Agency, Bristol, UK, p. 41 p. : fig., plates, tabs., 2000.

M. Styles y Keating, T., «Water efficient schools : Chesswood Middle school project : final project report». Southern Water, Worthing, UK, p. 12 p.: fig., tab., 2000.