Douglas, C.
, Simeroth, J.
and Davis, J.
(1954),
Visual Landing Aids Field Service Operation ::progress report for the period December 1, 1952 to November 30, 1953, , National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NBS.RPT.3046
(Accessed December 13, 2024)