Document 1759
Weitz, H. 1996. Standardized bird counts on German airfields – Method and first results from Frankfurt Airport. Proceedings of the International Bird Strike Committee, London, England IBSC23/WP15:103-114.
Weitz, H. 1996. Standardized bird counts on German airfields – Method and first results from Frankfurt Airport. Proceedings of the International Bird Strike Committee, London, England IBSC23/WP15:103-114.
