Visual Glide Slope Indicator
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Illustrates the testing of several visual glide slope systems to set up a national standard.
Sources
- 16mm Filmography (legacy record) — title, year, creator, format, sound, description, catalog record
- usgov-av-1974 — title, year, creator, length, color, sound, description
Original permalink · Record added 2023-02-27 06:22:00