TY  - RPRT
TI  - Bureau circular no. 11 4th edition: analyzed irons and steels - general information as to samples
PY  - 1909
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 11e4
DO  - 10.6028/NBS.CIRC.11e4
ER  -