TY - RPRT TI - Life-cycle costing for energy conservation in buildings: student's manual AU - Ruegg, Rosalie T AU - Petersen, Stephen R PY - 1992 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 4778 DO - 10.6028/NIST.IR.4778 ER -