TY  - RPRT
TI  - Circular of the Bureau of Standards no. 460: publications of the National Bureau of Standards 1901 to June 30, 1947
PY  - 1948
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 460
DO  - 10.6028/NBS.CIRC.460
ER  -