TY  - RPRT
TI  - Drafting test methods for photovoltaic systems 
AU  - Lankford, W F
AU  - Schafft, H A
PY  - 1980
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 80-2060
DO  - 10.6028/NBS.IR.80-2060
ER  -