TY  - RPRT
TI  - Recommended practice for measuring net benefits and internal rates of return for investments in buildings and building systems 
AU  - Marshall, Harold E
PY  - 1983
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 83-2657
DO  - 10.6028/NBS.IR.83-2657
ER  -