"- (1982 : Amherst)" . . . "Sewage disposal in rivers, lakes, etc." . . . . . "Conference papers and proceedings"@en . "Conference papers and proceedings" . . . . . . . . . . . . . "Ecological considerations in wetlands treatment of municipal wastewaters"@en . "Ecological considerations in wetlands treatment of municipal wastewaters" . . . . . . . "Ecological considerations in wetlands treatment of municipal wastewaters : [papers presented at a workshop held at Amherst on June 23-25, 1982]" . . . . . . . . . . "Sewage Environmental aspects Congresses." . . "Wetland ecology Congresses." . . "Sewage disposal in rivers, lakes, etc. Congresses." . . "Écologie des zones humides Congrès." . . . . "Sewage Environmental aspects." . . "Eaux usées Aspect de l'environnement Congrès." . . "Eaux usées Évacuation dans les cours d'eau, lacs, etc. Congrès." . . "Wetland ecology." . .