http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Design and operation of the activated sludge process
Workshop on Design and Operation of the Activated Sludge Process (1978 : Buffalo)
Papers prepared for the "Workshop on Design and Operation of the Activated Sludge Process," Buffalo, 1978.
Water resources and environmental engineering research report ; no. 78-2