TY  - RPRT
TI  - Standards for photovoltaic energy conversion systems 
AU  - Schafft, Harry A
PY  - 1979
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 79-1743
DO  - 10.6028/NBS.IR.79-1743
ER  -