TY - CONF AU - Pratt, Kenneth AU - Duewer, David C2 - 2009 NCSL International Workshop and Symposium, San Antonio, TX DA - 2009-07-30 LA - en PB - 2009 NCSL International Workshop and Symposium, San Antonio, TX PY - 2009 TI - Key Comparisons in Electrochemistry: Significance to Metrology and Global Trade ER -