TY - RPRT TI - FEDSOL : program user's manual and economic optimization guide for solar federal buildings projects AU - Powell, Jeanne W AU - Rodgers, Richard C PY - 1981 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 81-2342 DO - 10.6028/NBS.IR.81-2342 ER -