Sewage lagoons -- Australia -- South Australia. : The performance of tertiary treatment ponds and the role of algae, macrophytes and zooplankton in the waste treatment process / by B.D. Mitchell and W.D. Williams
Sewage lagoons -- Middle East -- Congresses. : Waste stabilization ponds : proceedings of an IAWPRC specialized conference held in Lisbon, Portugal, 29 June-2 July 1987 / editors, D.D. Mara and M.H. Marecos do Monte