Document 892
Houghton, E.W. 1971. ATC and Bird Radar Surveillance Without Tears. Proceedings of the Bird Strike Committee Europe. BSCE6-2.12. Copenhagen, Denmark. 15 pages.
Houghton, E.W. 1971. ATC and Bird Radar Surveillance Without Tears. Proceedings of the Bird Strike Committee Europe. BSCE6-2.12. Copenhagen, Denmark. 15 pages.
