TY  - RPRT
TI  - Circular of the Bureau of Standards no. 566: 
AU  - Deitz, Victor R
PY  - 1956
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 566
DO  - 10.6028/NBS.CIRC.566
ER  -