Cite
MLA Citation
British Standards Institution,. BS EN 17670-1. Plastics piping systems for non-pressure underground conveyance and storage of non-potable water. Manholes, inspection chambers and road gullies for storm water systems made of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE).. London : British Standards Institution, 2021. http://access.bl.uk/ark:/81055/vdc_100120948544.0x000001