TY - RPRT TI - Field performance of three residential heat pumps in the cooling mode AU - Parkern, Walter H AU - Didion, David A AU - Wojciechowski, Paul H AU - Chern, Lih PY - 1985 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 85-3107 DO - 10.6028/NBS.IR.85-3107 ER -