TY - CONF AU - Chang, Yui-May C2 - Proc., International Conference on Electrical Metrology (SEMETRO), Rio de Janeiro, BR DA - 1998-09-15 LA - en PB - Proc., International Conference on Electrical Metrology (SEMETRO), Rio de Janeiro, BR PY - 1998 TI - The Transfer, Maintenance, and Dissemination of Low-Frequency Impedance at NIST ER -