TY - VIDEO AU - Stephan Schlamminger AU - Peter Mohr C2 - IUPAP Newsletter DA - 2021-02-10 LA - en PB - IUPAP Newsletter PY - 2021 TI - Revision of the International System of Units (SI) UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=927216 ER -