Cite
MLA Citation
British Standards Institution,. BS EN 13656. Soil, treated biowaste, sludge and waste. Digestion with a hydrochloric (HCl), nitric (HNO3) and tetrafluoroboric (HBF4) or hydrofluoric (HF) acid mixture for subsequent determination of elements.. London : British Standards Institution, 2019. http://access.bl.uk/ark:/81055/vdc_100105188922.0x000001