W. J. Boon, Hertogs, E. J., and de Vries, G. P.,
“Gemeentelijk vast afvalmanagement in ontwikkelingslanden : verslag studiedag”. Vereniging van Nederlandse Gemeenten, The Hague, The Netherlands, p. i, 36 p., 1995.
M. Judd and Pollard, R.,
“Shedding light on nightsoil : the nightsoil management improvement study in Hubei, China”, vol. no. 4. UNDP-World Bank Regional Water and Sanitation Group for East Asia and the Pacific, Jakarta, Indonesia, p. 8 p., 1995.
