TY - JOUR AU - Z Wu AU - Kenneth Inn AU - Z Lin AU - C McMahon AU - Lisa Karam C2 - Applied Radiation and Isotopes DA - 2002-01-01 00:01:00 LA - en M1 - 56 PB - Applied Radiation and Isotopes PY - 2002 TI - NIST Radiochemistry Intercomparison Program: a Summary of Four-year Performance Evaluation Study ER -