Document 1567
Stenman, O. and H. Helkamo. 1994. Bird Strike Prevention at Helsinki-Vantaa Airport. Proceedings of the International Bird Strike Committee, Vienna, Austria IBSC22/WP67:467-470.
Stenman, O. and H. Helkamo. 1994. Bird Strike Prevention at Helsinki-Vantaa Airport. Proceedings of the International Bird Strike Committee, Vienna, Austria IBSC22/WP67:467-470.
