TY  - RPRT
TI  - Laboratories technically qualified to test solar collectors in accordance with ASHRAE Standard 93-77 : a summary report
AU  - Niessing, W J
PY  - 1978
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 78-1535
DO  - 10.6028/NBS.IR.78-1535
ER  -