TY - BOOK AU - Pickford,John AU - Ball,Susan ED - WEDC Conference (6th : (1980 : Zaria) TI - Water and waste engineering in Africa: 6th WEDCV conference 24 28 March 1980 at Ahmadu Bello University, Zaria, Nigeria U1 - 628.1 PY - 1981/// CY - Loughborough PB - Department of Civil Engineering, University of Technology KW - Water-supply KW - Africa KW - Sewage disposal ER -