Operation and maintenance of urban water supply and sanitation systems :
Operation and maintenance of urban water supply and sanitation systems : guide for managers /
World Healt Organization.
- Geneva, Switzerland : World Health Organization, 1994.
- 102 p. ; 24 cm.
Bibliografia: p. 101-102.
9241544716
TD345 / O64 1994
Bibliografia: p. 101-102.
9241544716
TD345 / O64 1994