Document 956
Karlsson, J. 1977. Surveys of Bird Concentration Areas as a Tool in Aviation Safety Work – With an Example From Sweden. Proceedings of the Bird Strike Committee Europe. BSCE12-WP13. Paris, France. 7 pages.
Karlsson, J. 1977. Surveys of Bird Concentration Areas as a Tool in Aviation Safety Work – With an Example From Sweden. Proceedings of the Bird Strike Committee Europe. BSCE12-WP13. Paris, France. 7 pages.
