TY  - RPRT
TI  - Specifications and tolerances for reference standards and field standard weights and measures I. specifications and tolerances for field standard weights (NBS class F) 
PY  - 1990
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST HB 105-1-1990
DO  - 10.6028/NIST.HB.105-1-1990
ER  -