TY  - RPRT
TI  - Circular of the Bureau of Standards no. 594: preparation, maintenance, and application of standards of radioactivity
AU  - Mann, W B
PY  - 1958
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 594
DO  - 10.6028/NBS.CIRC.594
ER  -