00355nam a2200097Ia 450000500170000008200180001710000260003524501310006126000550019230000100024720260731130208.0  a614.7 bBLA-H  aBlack, MaggieeAuthor 0aFrom handpumps to health : bThe evolution of water and sanitation programmes in Bangladesh, India and Nigeria /cMaggie Black  aNew York :bUnited Nations Children's Fund,c1990.  a133p.