TY  - RPRT
TI  - Economic efficiency in the sizing of residential heat pumps 
AU  - Levy, Joel
AU  - Petersen, Stephen R
PY  - 1981
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 80-2176
DO  - 10.6028/NBS.IR.80-2176
ER  -