TY - JOUR AU - Larry Lucas C2 - Journal of Research of the National Institute of Standards and Technology DA - 2000-01-01 LA - en M1 - 105 PB - Journal of Research of the National Institute of Standards and Technology PY - 2000 TI - Massic Activity Ratios of the NBS/NIST Tritiated-Water Standards Issued Between 1954 and 1999 ER -