TY  - RPRT
TI  - Letter Circular 297: electric and gas refrigerators (replaces Letter Circular 255)
PY  - 1931
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 297
DO  - 10.6028/NBS.LCIRC.297
ER  -