TY  - RPRT
TI  - Development, testing and evaluation of visual landing aids: consolidated progress report for the period July 1 to September 30, 1967
PY  - 1967
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS RPT 9661
DO  - 10.6028/NBS.RPT.9661
ER  -