T. Bondelid,
“DEMDESS 1994 summary report”, vol. no. 441. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. xi, 92 p.: 21 fig., 1994.
H. Wihuri,
“Water, sanitation and environment : exposure visit and seminar : 3 - 14 October 1994 : objective, methodology, programme and material : descriptive report”. IRC, The Hague, The Netherlands, p. ca. 500 p.: fig., maps, tab., 1994.