TY  - RPRT
TI  - Letter Circular 855: home heating problems (superseding Letter Circular 840)
PY  - 1947
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 855r1947
DO  - 10.6028/NBS.LCIRC.855r1947
ER  -