TY  - RPRT
TI  - Reference materials for the determination of trace elements in biological fluids 
AU  - LaFleur, P D
PY  - 1973
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 73-406
DO  - 10.6028/NBS.IR.73-406
ER  -