TY - JOUR AU - Brian Zimmerman AU - Coll{eacute} r C2 - Journal of Research of the National Institute of Standards and Technology DA - 1997-01-01 LA - en M1 - 102 PB - Journal of Research of the National Institute of Standards and Technology PY - 1997 TI - Standardization of 63Ni by 4πβ Liquid Scintillation Spectrometry with 3H-Standard Efficiency Tracing ER -