Best Practice on Biosand Filter :

ACKU
DACAAR.
Kabul, Afghanistan : DACAAR, 2012.
i, 11 pages : color illustrations ; 27 cm.
Filters and filtration.
Water
Purification.
Water-supply
Afghanistan.
Water
Purification
Filtration.
Water-supply
Management.
Afghanistan
Pamphlet TD441. / B47 2012
Library of Congress Classification / Monograph
3ACKU000353580 3ACKU000353572 3ACKU000353598 3ACKU000532423
Cover title.
“November 2012”.