TY  - RPRT
TI  - Letter Circular 664: metallurgy - publications by members of the staff of the National Bureau of Standards (1931-1941) (supersedes Letter Circular 522)
PY  - 1941
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 664
DO  - 10.6028/NBS.LCIRC.664
ER  -