Drainage and Sewerage Systems for Buildings and Plots of Land; Specifications for the Determination of the Internal Diameters and Nominal Widths of Pipelines— 28 стр.
Precast unreinforced and reinforced concrete components for manholes over buried drains and sewers - Dimensions and technical delivery conditions— 16 стр.
Small sewage treatment plants - Plants without aeration (septic tanks) - Part 101: Principles for factory production control and third party control— 6 стр.