TY  - RPRT
TI  - Energy conservation in buildings: an economics guidebook for investment decisions 
AU  - Marshall, Harold E
AU  - Ruegg, Rosalie T
PY  - 1980
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS HB 132
DO  - 10.6028/NBS.HB.132
ER  -