TY  - RPRT
TI  - Letter Circular 528: testing laboratories equipped for thermal expansion tests of solids (supersedes Letter Circular 234)
PY  - 1938
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 528
DO  - 10.6028/NBS.LCIRC.528
ER  -