Slow sand filtration /
Huisman, L.,
Slow sand filtration / by L. Huisman and W.E. Wood. - Geneva: World Health Organization, 1974. - 122 p. : ill. ; 24 cm.
9241540370
Water--Purification--Filtration
Slow sand filtration / by L. Huisman and W.E. Wood. - Geneva: World Health Organization, 1974. - 122 p. : ill. ; 24 cm.
9241540370
Water--Purification--Filtration
