TY - CONF AU - El, Darine AU - Seifert, Frank AU - Schlamminger, Stephan AU - Chao, Leon AU - Newell, David AU - Pratt, Jon C2 - CPEM 2014 Digest, Rio de Janeiro, -1 DA - 2014-08-24 LA - en PB - CPEM 2014 Digest, Rio de Janeiro, -1 PY - 2014 TI - Heterodyne interferometer with subnanometer accuracy UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=915347 ER -