TY - JOUR AU - Fitzgerald, Ryan AU - Laureano-Perez, Lizbeth AU - Hammond, Michelle AU - Pibida, Leticia AU - Nour, Svetlana AU - Zimmerman, Brian C2 - Applied Radiation and Isotopes DA - 2010-01-07 LA - en M1 - 68 PB - Applied Radiation and Isotopes PY - 2010 TI - A New Primary Standardization of Th-229 ER -