TY  - RPRT
TI  - Letter Circular 972: publications relating to building construction -- home building -- building material specification -- home maintenance (superseding Letter Circular 891)
PY  - 1950
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 972
DO  - 10.6028/NBS.LCIRC.972
ER  -