TY - RPRT TI - A "reference building" approach to building energy performance standards for single-family residences AU - Petersen, Stephen R AU - Heldenbrand, Jim L PY - 1980 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 80-2161 DO - 10.6028/NBS.IR.80-2161 ER -