TY  - RPRT
TI  - Letter Circular 168: addresses of sources of publications issued by the lime, gypsum and sand-lime brick section
PY  - 1927
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 168r1927
DO  - 10.6028/NBS.LCIRC.168r1927
ER  -