G. Howard,
Water quality surveillance : a practical guide. Loughborough, UK: Water, Engineering and Development Centre, Loughborough University of Technology, WEDC, 2002, p. viii, 53 p. : 25 p. annexes : boxes, fig.
G. Howard,
Water supply surveillance : a reference manual. Loughborough, UK: Water, Engineering and Development Centre, Loughborough University of Technology, WEDC, 2002, p. xi, 236 p.
