Babala, S.

Babala, S., 1990. Cost analysis in rural water supply in Mbeya Region, Tanzania, (Publication Series B / Tampere University of Technology no. 42) Tampere, Finland: Tampere University of Technology, Institute of Water and Environmental Engineeri. Available at: http://fr.ircwash.org/sites/default/files/824-TZMB-7802.pdf.