TY  - RPRT
TI  - Development, testing, and evaluation of visual landing aids: consolidated progress report for the period July 1 to September 30, 1959
PY  - 1959
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS RPT 6580
DO  - 10.6028/NBS.RPT.6580
ER  -