00487nam a2200157   450000500170000000700040001700800040002102000150002504000090004005000220004910000280007124500900009926000450018930000210023465000740025520150619090122.0000000  a0340284293  aUOEL  aHD1698b.N57 1982  aNissen - Petersen, Erik  aRain catchment and water supply in rural Africa :ba manual /cErik Nissen - Petersen  aLondon ;bHodder and Stoughton ,cc1982.  ax, 83 p. :bill.  aRain catchmentxEconomic history and conditions (National production)