Physical and chemical aspects of sewage treatment in gravel bed hydroponic (GBH) systems /
Williams, John.
University of Portsmouth.Department of Civil Engineering.
Jāmi'at Qanāt al-Suways.
Great Britain.Overseas Development Administration.
Portsmouth : Department of Civil Engineering, University of Portsmouth,
1995.
Research conducted in collaboration with Suez Canal University, Ismailia, Egypt.
Research supported by the Overseas Development Administration.
Includes bibliographical references.