Code of basic requirements for water supply, drainage and sanitation. /

Eitemau Tebyg

• Code of basic requirements for water supply ,drainage and sanitation , 1172-1983 /
  Cyhoeddwyd: (1989)
• Sanitation, drainage and water supply /
  gan: Mitchell, Eric.G .
  Cyhoeddwyd: (1961)
• Water supply and Drainage /
  gan: Freeman, William
  Cyhoeddwyd: (1945)
• Sanitation, drainage and watersupply /
  gan: Mithchell, G. Eric
  Cyhoeddwyd: (1960)
• Rural water supply and sanitation /
  gan: Wright, Forrest B.
  Cyhoeddwyd: (1969)